A cockatoo is any of the 21
parrot
Parrots, also known as psittacines (), are birds of the roughly 398 species in 92 genera comprising the order Psittaciformes (), found mostly in tropical and subtropical regions. The order is subdivided into three superfamilies: the Psittacoid ...
species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...
belonging to the
family
Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...
Cacatuidae, the only family in the superfamily Cacatuoidea. Along with the Psittacoidea (
true parrot
The true parrots are about 350 species of hook-billed, mostly herbivorous birds forming the superfamily Psittacoidea, one of the three superfamilies in the biological order Psittaciformes (parrots). True parrots are widespread, with species in ...
s) and the Strigopoidea (large
New Zealand parrot
The New Zealand parrot family, Strigopidae,Nestoridae and Strigopidae are described in the same article, Bonaparte, C.L. (1849) ''Conspectus Systematis Ornithologiae''. Therefore, under rules of the ICZN, the first reviser determines priority, w ...
s), they make up the
order Psittaciformes. The family has a mainly
Australasia
Australasia is a region that comprises Australia, New Zealand and some neighbouring islands in the Pacific Ocean. The term is used in a number of different contexts, including geopolitically, physiogeographically, philologically, and ecologica ...
n distribution, ranging from the
Philippines
The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no),
* bik, Republika kan Filipinas
* ceb, Republika sa Pilipinas
* cbk, República de Filipinas
* hil, Republ ...
and the eastern
Indonesia
Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
n islands of
Wallacea
Wallacea is a biogeographical designation for a group of mainly Indonesian islands separated by deep-water straits from the Asian and Australian continental shelves. Wallacea includes Sulawesi, the largest island in the group, as well as Lo ...
to
New Guinea
New Guinea (; Hiri Motu
Hiri Motu, also known as Police Motu, Pidgin Motu, or just Hiri, is a language of Papua New Guinea, which is spoken in surrounding areas of Port Moresby (Capital of Papua New Guinea).
It is a simplified version of ...
, the
Solomon Islands
Solomon Islands is an island country consisting of six major islands and over 900 smaller islands in Oceania, to the east of Papua New Guinea and north-west of Vanuatu. It has a land area of , and a population of approx. 700,000. Its capita ...
and
Australia
Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...
.
Cockatoos are recognisable by the prominent
crests and curved
bills. Their
plumage
Plumage ( "feather") is a layer of feathers that covers a bird and the pattern, colour, and arrangement of those feathers. The pattern and colours of plumage differ between species and subspecies and may vary with age classes. Within species, ...
is generally less colourful than that of other parrots, being mainly white, grey or black and often with coloured features in the crest, cheeks or tail. On average they are larger than other parrots; however, the
cockatiel
The cockatiel (; ''Nymphicus hollandicus''), also known as weiro (also spelt weero), or quarrion, is a medium-sized parrot that is a member of its own branch of the cockatoo family endemic to Australia. They are prized as household pets and comp ...
, the smallest cockatoo species, is a small bird. The phylogenetic position of the cockatiel remains unresolved, other than that it is one of the earliest offshoots of the cockatoo lineage. The remaining species are in two main clades. The five large black-coloured cockatoos of the genus ''
Calyptorhynchus
Described by French naturalist Anselme Gaëtan Desmarest in 1826, the genus ''Calyptorhynchus'' has two species of cockatoos. They are all mostly black in colour, and the taxa may be differentiated partly by size and partly by small areas of red, ...
'' form one branch. The second and larger branch is formed by the genus ''
Cacatua
''Cacatua'' is a genus of cockatoos found from the Philippines and Wallacea east to the Solomon Islands and south to Australia. They have a primarily white plumage (in some species tinged pinkish or yellow), an expressive crest, and a black (sub ...
'', comprising 11 species of white-plumaged cockatoos and four monotypic genera that branched off earlier; namely the pink and white
Major Mitchell's cockatoo
Major Mitchell's cockatoo (''Lophochroa leadbeateri''), also known as Leadbeater's cockatoo or the pink cockatoo, is a medium-sized cockatoo that inhabits arid and semi-arid inland areas of Australia, though it is seen regularly in other climat ...
, the pink and grey
galah
The galah (; ''Eolophus roseicapilla''), also known as the pink and grey cockatoo or rose-breasted cockatoo, is the only species within genus ''Eolophus'' of the cockatoo family. Found throughout Australia, it is among the most common of the co ...
, the mainly grey
gang-gang cockatoo
The gang-gang cockatoo (''Callocephalon fimbriatum'') is a parrot found in the cooler and wetter forests and woodlands of Australia, particularly alpine bushland. It is the only species placed in the genus ''Callocephalon''. Mostly mild grey in ...
and the large black-plumaged
palm cockatoo
The palm cockatoo (''Probosciger aterrimus''), also known as the goliath cockatoo or great black cockatoo, is a large smoky-grey or black parrot of the cockatoo family native to New Guinea, Aru Islands, and Cape York Peninsula. It has a very l ...
.
Cockatoos prefer to eat seeds,
tuber
Tubers are a type of enlarged structure used as storage organs for nutrients in some plants. They are used for the plant's perennation (survival of the winter or dry months), to provide energy and nutrients for regrowth during the next growing ...
s,
corm
A corm, bulbo-tuber, or bulbotuber is a short, vertical, swollen underground plant stem that serves as a storage organ that some plants use to survive winter or other adverse conditions such as summer drought and heat (perennation).
The word ' ...
s, fruit, flowers and insects. They often feed in large flocks, particularly when ground-feeding. Cockatoos are
monogamous
Monogamy ( ) is a form of Dyad (sociology), dyadic Intimate relationship, relationship in which an individual has only one Significant other, partner during their lifetime. Alternately, only one partner at any one time (Monogamy#Serial monogamy, ...
and nest in
tree hollow
A tree hollow or tree hole is a semi-enclosed cavity which has naturally formed in the trunk or branch of a tree. They are found mainly in old trees, whether living or not. Hollows form in many species of trees, and are a prominent feature of nat ...
s. Some cockatoo species have been adversely affected by
habitat loss
Habitat destruction (also termed habitat loss and habitat reduction) is the process by which a natural habitat becomes incapable of supporting its native species. The organisms that previously inhabited the site are displaced or dead, thereby ...
, particularly from a shortage of suitable nesting hollows after large mature trees are cleared; conversely, some species have adapted well to human changes and are considered agricultural
pests.
Cockatoos are popular birds in
aviculture
Aviculture is the practice of keeping and breeding birds, especially of wild birds in captivity.
Types
There are various reasons that people get involved in aviculture. Some people breed birds to preserve a species. Some people breed parrots a ...
, but their needs are difficult to meet. The cockatiel is the easiest cockatoo species to maintain and is by far the most frequently kept in captivity. White cockatoos are more commonly found in captivity than black cockatoos. Illegal trade in wild-caught birds contributes to the decline of some cockatoo species in the wild.
Etymology
The word cockatoo dates from the 17th century and is derived from
Dutch
Dutch commonly refers to:
* Something of, from, or related to the Netherlands
* Dutch people ()
* Dutch language ()
Dutch may also refer to:
Places
* Dutch, West Virginia, a community in the United States
* Pennsylvania Dutch Country
People E ...
''kaketoe'', which is from
Malay
Malay may refer to:
Languages
* Malay language or Bahasa Melayu, a major Austronesian language spoken in Indonesia, Malaysia, Brunei and Singapore
** History of the Malay language, the Malay language from the 4th to the 14th century
** Indonesi ...
''kakatua''. Seventeenth-century variants include cacato, cockatoon and crockadore, and cokato, cocatore and were used in the eighteenth century.
The derivation has also been used for the family and
generic
Generic or generics may refer to:
In business
* Generic term, a common name used for a range or class of similar things not protected by trademark
* Generic brand, a brand for a product that does not have an associated brand or trademark, other ...
names Cacatuidae and ''Cacatua'', respectively.
In
Australian slang
Australian English is a major variety of the English language spoken throughout Australia. Most of the vocabulary of Australian English is shared with British English, though there are notable differences. The vocabulary of Australia is drawn ...
or vernacular speech, a person who is assigned to keep watch while others undertake clandestine or illegal activities, particularly gambling, may be referred to as a "cockatoo".
Proprietors of small agricultural undertakings are often jocularly or slightly disparagingly referred to as "cocky farmers".
Taxonomy
The cockatoos were first defined as a subfamily
Cacatuinae
The subfamily Cacatuinae consists of two tribes, the Microglossini with one species ( palm cockatoo) and the Cacatuini with four genera:
Cacatuidae
{{parrot-stub ...
within the parrot family
Psittacidae
The family Psittacidae or holotropical parrots is one of three families of true parrots. It comprises the roughly 10 species of subfamily Psittacinae (the Old World or Afrotropical parrots) and 157 of subfamily Arinae (the New World or Neotropic ...
by the English naturalist
George Robert Gray
George Robert Gray FRS (8 July 1808 – 6 May 1872) was an English zoologist and author, and head of the ornithological section of the British Museum, now the Natural History Museum, in London for forty-one years. He was the younger brother o ...
in 1840, with ''Cacatua'' the first listed and type genus.
This group has alternately been considered as either a full or subfamily by different authorities. The American ornithologist
James Lee Peters
James Lee Peters (August 13, 1889 – April 19, 1952) was an American ornithologist.
He was born in Boston, Massachusetts to Dr. Austin Peters and Francis Howie Lee on August 13, 1889. His early education was at the Roxbury Latin School, followed ...
in his 1937 ''Check-list of Birds of the World'',
Sibley and
Monroe in 1990 maintained it as a subfamily, while parrot expert
Joseph Forshaw
Joseph Michael Forshaw is an Australian ornithologist, and expert on parrots. He was the former head of wildlife conservation for the Australian National Parks and Wildlife Service. Dreifus, Claudia.A Conversation With Joseph M. Forshaw: A Passi ...
classified it as a family in 1973. Subsequent molecular studies indicate that the earliest offshoot from the original parrot ancestors were the
New Zealand parrot
The New Zealand parrot family, Strigopidae,Nestoridae and Strigopidae are described in the same article, Bonaparte, C.L. (1849) ''Conspectus Systematis Ornithologiae''. Therefore, under rules of the ICZN, the first reviser determines priority, w ...
s of the superfamily Strigopoidea, and following this the cockatoos, now a well-defined group or
clade
A clade (), also known as a monophyletic group or natural group, is a group of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a phylogenetic tree. Rather than the English term, ...
, split off from the remaining parrots, which then radiated across the Southern Hemisphere and diversified into the many species of parrots,
parakeet
A parakeet is any one of many small to medium-sized species of parrot, in multiple Genus, genera, that generally has long tail feathers.
Etymology and naming
The name ''parakeet'' is derived from the French wor''perroquet'' which is reflec ...
s,
macaw
Macaws are a group of New World parrots that are long-tailed and often colorful. They are popular in aviculture or as companion parrots, although there are conservation concerns about several species in the wild.
Biology
Of the many differe ...
s,
lories, lorikeets,
lovebird
Lovebird is the common name for the genus ''Agapornis'', a small group of parrots in the Old World parrot family Psittaculidae. Of the nine species in the genus, all are native to the African continent, with the grey-headed lovebird being native ...
s and other
true parrot
The true parrots are about 350 species of hook-billed, mostly herbivorous birds forming the superfamily Psittacoidea, one of the three superfamilies in the biological order Psittaciformes (parrots). True parrots are widespread, with species in ...
s of the superfamily
Psittacoidea
The true parrots are about 350 species of hook-billed, mostly herbivorous birds forming the superfamily Psittacoidea, one of the three superfamilies in the biological order Psittaciformes (parrots). True parrots are widespread, with species in ...
.
The relationships among various cockatoo genera are largely resolved,
although the placement of the cockatiel
The cockatiel (; ''Nymphicus hollandicus''), also known as weiro (also spelt weero), or quarrion, is a medium-sized parrot that is a member of its own branch of the cockatoo family endemic to Australia. They are prized as household pets and comp ...
(''Nymphicus hollandicus'') at the base of the cockatoos remains uncertain. The cockatiel is alternatively placed basal to all other cockatoo species,[ as the sister taxon to the black cockatoo species of the genus ''Calyptorhynchus''][ or as the sister taxon to a clade consisting of the white and pink cockatoo genera as well as the ]palm cockatoo
The palm cockatoo (''Probosciger aterrimus''), also known as the goliath cockatoo or great black cockatoo, is a large smoky-grey or black parrot of the cockatoo family native to New Guinea, Aru Islands, and Cape York Peninsula. It has a very l ...
. The remaining species are within two main clades, one consisting of the black species of the genus ''Calyptorhynchus'' while the other contains the remaining species.[ According to most authorities, the second clade includes the black palm cockatoo (''Probosciger''), the grey and reddish ]galah
The galah (; ''Eolophus roseicapilla''), also known as the pink and grey cockatoo or rose-breasted cockatoo, is the only species within genus ''Eolophus'' of the cockatoo family. Found throughout Australia, it is among the most common of the co ...
(''Eolophus''), the gang-gang cockatoo
The gang-gang cockatoo (''Callocephalon fimbriatum'') is a parrot found in the cooler and wetter forests and woodlands of Australia, particularly alpine bushland. It is the only species placed in the genus ''Callocephalon''. Mostly mild grey in ...
(''Callocephalon'') and the pinkish Major Mitchell's cockatoo
Major Mitchell's cockatoo (''Lophochroa leadbeateri''), also known as Leadbeater's cockatoo or the pink cockatoo, is a medium-sized cockatoo that inhabits arid and semi-arid inland areas of Australia, though it is seen regularly in other climat ...
(''Lophochroa''),[ although ''Probosciger'' is sometimes placed basal to all other species.] The remaining species are mainly white or slightly pinkish and all belong to the genus ''Cacatua''.[ The genera ''Eolophus'', ''Lophochroa'' and ''Cacatua'' are hypomelanistic. The genus ''Cacatua'' is further subdivided into the ]subgenera
In biology, a subgenus (plural: subgenera) is a taxonomic rank directly below genus.
In the International Code of Zoological Nomenclature, a subgeneric name can be used independently or included in a species name, in parentheses, placed between t ...
''Licmetis'', commonly known as corellas, and ''Cacatua'', referred to as white cockatoos. Confusingly, the term "white cockatoo" has also been applied to the whole genus. The five cockatoo species of the genus ''Calyptorhynchus'' are commonly known as black cockatoos,[ and are divided into two subgenera—''Calyptorhynchus'' and ''Zanda''. The former group are ]sexually dichromatic
Sexual dimorphism is the condition where the sexes of the same animal and/or plant species exhibit different morphological characteristics, particularly characteristics not directly involved in reproduction. The condition occurs in most anim ...
, with the females having prominently barred plumage. The two are also distinguished by differences in the food-begging calls of juveniles.
The fossil
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...
record of cockatoos is even more limited than that of parrots in general, with only one truly ancient cockatoo fossil known: a species of ''Cacatua'', most probably subgenus ''Licmetis'', found in Early Miocene
The Miocene ( ) is the first geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recen ...
(16–23 million year
A year or annus is the orbital period of a planetary body, for example, the Earth, moving in its orbit around the Sun. Due to the Earth's axial tilt, the course of a year sees the passing of the seasons, marked by change in weather, the hou ...
s ago) deposits of Riversleigh, Australia. Although fragmentary, the remains are similar to the western corella
The western corella (''Cacatua pastinator'') also known as the western long-billed corella, is a species of white cockatoo endemic to south-western Australia.
Taxonomy
Cacatuidae is one of three families of the large and diverse avian order Psit ...
and the galah. In Melanesia
Melanesia (, ) is a subregion of Oceania in the southwestern Pacific Ocean. It extends from Indonesia's New Guinea in the west to Fiji in the east, and includes the Arafura Sea.
The region includes the four independent countries of Fiji, Va ...
, subfossil
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in ...
bones of ''Cacatua'' species which apparently did not survive early human settlement have been found on New Caledonia
)
, anthem = ""
, image_map = New Caledonia on the globe (small islands magnified) (Polynesia centered).svg
, map_alt = Location of New Caledonia
, map_caption = Location of New Caledonia
, mapsize = 290px
, subdivision_type = Sovereign st ...
and New Ireland.[ The bearing of these fossils on cockatoo evolution and phylogeny is fairly limited, although the Riversleigh fossil does allow tentative dating of the divergence of subfamilies.
]
Genera and species
There are about 44 different birds in the cockatoo family Cacatuidae including recognized subspecies. The current subdivision of this family is as follows:
Subfamily Nymphicinae
* Genus ''Nymphicus''
**Cockatiel
The cockatiel (; ''Nymphicus hollandicus''), also known as weiro (also spelt weero), or quarrion, is a medium-sized parrot that is a member of its own branch of the cockatoo family endemic to Australia. They are prized as household pets and comp ...
, ''Nymphicus hollandicus'' (Kerr
Kerr may refer to:
People
*Kerr (surname)
*Kerr (given name) Places
;United States
*Kerr Township, Champaign County, Illinois
*Kerr, Montana, A US census-designated place
*Kerr, Ohio, an unincorporated community
*Kerr County, Texas
Other uses
...
, 1792)
Subfamily Calyptorhynchinae: Black cockatoos
* Genus ''Calyptorhynchus
Described by French naturalist Anselme Gaëtan Desmarest in 1826, the genus ''Calyptorhynchus'' has two species of cockatoos. They are all mostly black in colour, and the taxa may be differentiated partly by size and partly by small areas of red, ...
'' – black-and-red cockatoos
**Red-tailed black cockatoo
The red-tailed black cockatoo (''Calyptorhynchus banksii'') also known as Banksian- or Banks' black cockatoo, is a large black cockatoo native to Australia. Adult males have a characteristic pair of bright red panels on the tail that gives t ...
, ''Calyptorhynchus banksii'' ( Latham, 1790) (5 subspecies)
**Glossy black cockatoo
The glossy black cockatoo (''Calyptorhynchus lathami''), is the smallest member of the subfamily Calyptorhynchinae found in eastern Australia. Adult glossy black cockatoos may reach in length. They are sexually dimorphic. Males are blackish bro ...
, ''Calyptorhynchus lathami'' (Temminck
Coenraad Jacob Temminck (; 31 March 1778 – 30 January 1858) was a Dutch aristocrat, zoologist and museum director.
Biography
Coenraad Jacob Temminck was born on 31 March 1778 in Amsterdam in the Dutch Republic. From his father, Jacob Temmin ...
, 1807) (3 subspecies)
* Genus '' Zanda'' – black-and-yellow/white cockatoos
**Yellow-tailed black cockatoo
The yellow-tailed black cockatoo (''Zanda funerea'') is a large cockatoo native to the south-east of Australia measuring in length. It has a short crest on the top of its head. Its plumage is mostly brownish black and it has prominent yello ...
, ''Zanda funerea'' (Shaw
Shaw may refer to:
Places Australia
*Shaw, Queensland
Canada
*Shaw Street, a street in Toronto
England
*Shaw, Berkshire, a village
*Shaw, Greater Manchester, a location in the parish of Shaw and Crompton
*Shaw, Swindon, a List of United Kingdom ...
, 1794) (2–3 subspecies)
**Carnaby's black cockatoo
Carnaby's black cockatoo (''Zanda latirostris''), also known as the short-billed black cockatoo, is a large black cockatoo endemic to southwest Australia. It was described in 1948 by naturalist Ivan Carnaby. Measuring in length, it has a s ...
, ''Zanda latirostris'' (Carnaby, 1948)
**Baudin's black cockatoo
Baudin's black cockatoo (''Zanda baudinii''), also known as Baudin's cockatoo or the long-billed black cockatoo, is a species of genus '' Zanda'' found in southwest Australia. The epithet commemorates the French explorer Nicolas Baudin. It has ...
, ''Zanda baudinii'' (Lear
Lear or Leir may refer to:
Acronyms
* Liga de Escritores y Artistas Revolucionarios, a Mexican association of revolutionary artists and writers
* Low Energy Ion Ring, an ion pre-accelerator of the Large Hadron Collider at CERN
** Low Energy Antipr ...
, 1832)
Subfamily Cacatuinae
The subfamily Cacatuinae consists of two tribes, the Microglossini with one species ( palm cockatoo) and the Cacatuini with four genera:
Cacatuidae
{{parrot-stub ...
*Tribe Microglossini: One genus with one species, the black palm cockatoo
The palm cockatoo (''Probosciger aterrimus''), also known as the goliath cockatoo or great black cockatoo, is a large smoky-grey or black parrot of the cockatoo family native to New Guinea, Aru Islands, and Cape York Peninsula. It has a very l ...
.
** Genus ''Probosciger
The palm cockatoo (''Probosciger aterrimus''), also known as the goliath cockatoo or great black cockatoo, is a large smoky-grey or black parrot of the cockatoo family native to New Guinea, Aru Islands, and Cape York Peninsula. It has a very l ...
''
***Palm cockatoo, ''Probosciger aterrimus'' (Gmelin Gmelin may refer to:
* Gmelin's test, a chemical test
* Gmelin database, a German handbook/encyclopedia of inorganic compounds initiated by Leopold Gmelin
People
* Carl Christian Gmelin (1762–1837), German botanist, author of ''Flora Badensis ...
, 1788) (4 subspecies)
*Tribe Cacatuini
The tribe Cacatuini consists of four whitish, pinkish or greyish genera:
References
Bird tribes
Cacatuinae
{{parrot-stub ...
: Four genera of white, pink and grey species.
** Genus '' Callocephalon''
***Gang-gang cockatoo
The gang-gang cockatoo (''Callocephalon fimbriatum'') is a parrot found in the cooler and wetter forests and woodlands of Australia, particularly alpine bushland. It is the only species placed in the genus ''Callocephalon''. Mostly mild grey in ...
, ''Callocephalon fimbriatum'' (Grant
Grant or Grants may refer to:
Places
*Grant County (disambiguation)
Australia
* Grant, Queensland, a locality in the Barcaldine Region, Queensland, Australia
United Kingdom
*Castle Grant
United States
* Grant, Alabama
*Grant, Inyo County, C ...
, 1803)
** Genus ''Eolophus
The galah (; ''Eolophus roseicapilla''), also known as the pink and grey cockatoo or rose-breasted cockatoo, is the only species within genus ''Eolophus'' of the cockatoo family. Found throughout Australia, it is among the most common of the co ...
''
***Galah
The galah (; ''Eolophus roseicapilla''), also known as the pink and grey cockatoo or rose-breasted cockatoo, is the only species within genus ''Eolophus'' of the cockatoo family. Found throughout Australia, it is among the most common of the co ...
, ''Eolophus roseicapilla'' (Vieillot
Louis Pierre Vieillot (10 May 1748, Yvetot – 24 August 1830, Sotteville-lès-Rouen) was a French ornithologist.
Vieillot is the author of the first scientific descriptions and Linnaean names of a number of birds, including species he collect ...
, 1817) (3 subspecies)
** Genus '' Lophochroa''
***Major Mitchell's, Leadbeater's, or pink cockatoo
Major Mitchell's cockatoo (''Lophochroa leadbeateri''), also known as Leadbeater's cockatoo or the pink cockatoo, is a medium-sized cockatoo that inhabits arid and semi-arid inland areas of Australia, though it is seen regularly in other clima ...
, ''Lophochroa leadbeateri'' ( Vigors, 1831) (2 subspecies)
** Genus ''Cacatua
''Cacatua'' is a genus of cockatoos found from the Philippines and Wallacea east to the Solomon Islands and south to Australia. They have a primarily white plumage (in some species tinged pinkish or yellow), an expressive crest, and a black (sub ...
'' (11 species)
*** Subgenus ''Cacatua
''Cacatua'' is a genus of cockatoos found from the Philippines and Wallacea east to the Solomon Islands and south to Australia. They have a primarily white plumage (in some species tinged pinkish or yellow), an expressive crest, and a black (sub ...
'' – true white cockatoos
****Yellow-crested cockatoo
The yellow-crested cockatoo (''Cacatua sulphurea'') also known as the lesser sulphur-crested cockatoo, is a medium-sized (about 34-cm-long) cockatoo with white plumage, bluish-white bare orbital skin, grey feet, a black bill, and a retractile y ...
or lesser sulphur-crested cockatoo, ''Cacatua sulphurea'' (Gmelin Gmelin may refer to:
* Gmelin's test, a chemical test
* Gmelin database, a German handbook/encyclopedia of inorganic compounds initiated by Leopold Gmelin
People
* Carl Christian Gmelin (1762–1837), German botanist, author of ''Flora Badensis ...
, 1788) (4 subspecies)
****Sulphur-crested cockatoo
The sulphur-crested cockatoo (''Cacatua galerita'') is a relatively large white cockatoo found in wooded habitats in Australia, New Guinea, and some of the islands of Indonesia. They can be locally very numerous, leading to them sometimes being ...
, ''Cacatua galerita'' ( Latham, 1790) (4 subspecies)
****Blue-eyed cockatoo
The blue-eyed cockatoo (''Cacatua ophthalmica'') is a large, mainly white cockatoo about long with a mobile crest, a black beak, and a light blue rim of featherless skin around each eye that gives this species its name.
Like all cockatoos and m ...
, ''Cacatua ophthalmica'' Sclater, 1864
****White cockatoo
The white cockatoo (''Cacatua alba''), also known as the umbrella cockatoo, is a medium-sized all-white cockatoo endemic to tropical rainforest on islands of Indonesia. When surprised, it extends a large and striking head crest, which has a sem ...
or umbrella cockatoo, ''Cacatua alba'' ( Müller, 1776)
****Salmon-crested cockatoo
The salmon-crested cockatoo (''Cacatua moluccensis''), also known as the Moluccan cockatoo, is a cockatoo endemic to the Seram archipelago in eastern Indonesia. At a height of up to and weight of up to , it is among the largest of the white co ...
or Moluccan cockatoo, ''Cacatua moluccensis'' (Gmelin Gmelin may refer to:
* Gmelin's test, a chemical test
* Gmelin database, a German handbook/encyclopedia of inorganic compounds initiated by Leopold Gmelin
People
* Carl Christian Gmelin (1762–1837), German botanist, author of ''Flora Badensis ...
, 1788)
*** Subgenus ''Licmetis
''Licmetis'' is a subgenus of the white cockatoos (genus ''Cacatua''). They are collectively known as corellas in Australia. Three of the six species are primarily – or only – found in Australia, while the Philippines, Indonesia, and the S ...
'' – corellas
****Long-billed corella
The long-billed corella or slender-billed corella (''Cacatua tenuirostris'') is a cockatoo native to Australia, which is similar in appearance to the little corella. This species is mostly white, with a reddish-pink face and forehead, and has a lo ...
, ''Cacatua tenuirostris'' ( Kuhl, 1820)
****Western corella
The western corella (''Cacatua pastinator'') also known as the western long-billed corella, is a species of white cockatoo endemic to south-western Australia.
Taxonomy
Cacatuidae is one of three families of the large and diverse avian order Psit ...
, ''Cacatua pastinator'' (Gould
Gould may refer to:
People
* Gould (name), a surname
Places United States
* Gould, Arkansas, a city
* Gould, Colorado, an unincorporated community
* Gould, Ohio, an unincorporated community
* Gould, Oklahoma, a town
* Gould, West Virginia, a ...
, 1841) (2 subspecies)
****Little corella
The little corella (''Cacatua sanguinea''), also known as the short-billed corella, bare-eyed cockatoo, blood-stained cockatoo, and little cockatoo is a white cockatoo native to Australia and southern New Guinea. It was known as ''Birdirra'' amo ...
(also bare-eyed cockatoo), ''Cacatua sanguinea'' Gould
Gould may refer to:
People
* Gould (name), a surname
Places United States
* Gould, Arkansas, a city
* Gould, Colorado, an unincorporated community
* Gould, Ohio, an unincorporated community
* Gould, Oklahoma, a town
* Gould, West Virginia, a ...
, 1843 (4 subspecies)
****Tanimbar corella
The Tanimbar corella (''Cacatua goffiniana''), also known as Goffin's cockatoo, is a species of cockatoo endemic to forests of Yamdena, Larat and Selaru, all islands in the Tanimbar Islands archipelago in Indonesia. It has been introduced to t ...
or Goffin's cockatoo, ''Cacatua goffiniana'' Roselaar and Michels, 2004
****Solomons cockatoo
The Solomons cockatoo (''Cacatua ducorpsii''), also known as the Ducorps's cockatoo, Solomons corella or broad-crested corella, is a species of cockatoo endemic to the Solomon Islands archipelago. This small white cockatoo is larger than the Tan ...
or Ducorps's cockatoo, ''Cacatua ducorpsii'' Pucheran, 1853
****Red-vented cockatoo
The red-vented cockatoo (''Cacatua haematuropygia''), also known as the Philippine cockatoo and locally katala, abukay, agay or kalangay, is a species of cockatoo. It is endemic to the Philippines though pressured by various environmental degradat ...
or Philippine cockatoo, ''Cacatua haematuropygia'' ( Müller, 1776)
Morphology
The cockatoos are generally medium to large parrots of stocky build, which range from in length and in weight; however, one species, the cockatiel, is considerably smaller and slimmer than the other species, being long (including its long pointed tail feathers) and in weight.[.] The movable headcrest, which is present in all cockatoos, is spectacular in many species; it is raised when the bird lands from flying or when it is aroused.[ Cockatoos share many features with other parrots, including the characteristic curved beak shape and a ]zygodactyl
In biology, dactyly is the arrangement of digits (fingers and toes) on the hands, feet, or sometimes wings of a tetrapod animal. It comes from the Greek word δακτυλος (''dáktylos'') = "finger".
Sometimes the ending "-dactylia" is used ...
foot, with the two middle toes forward and the two outer toes backward. They differ in the presence of an erectile crest and their lack of the Dyck texture
Feathers are epidermal growths that form a distinctive outer covering, or plumage, on both avian (bird) and some non-avian dinosaurs and other archosaurs. They are the most complex integumentary structures found in vertebrates and a premier ...
feather composition which causes the bright blues and greens seen in true parrots.[
Like other parrots, cockatoos have short legs, strong claws, a waddling gait][ and often use their strong bill as a third limb when climbing through branches. They generally have long broad wings used in rapid flight, with speeds up to being recorded for galahs.][.] The members of the genus ''Calyptorhynchus'' and larger white cockatoos, such as the sulphur-crested cockatoo
The sulphur-crested cockatoo (''Cacatua galerita'') is a relatively large white cockatoo found in wooded habitats in Australia, New Guinea, and some of the islands of Indonesia. They can be locally very numerous, leading to them sometimes being ...
and Major Mitchell's cockatoo
Major Mitchell's cockatoo (''Lophochroa leadbeateri''), also known as Leadbeater's cockatoo or the pink cockatoo, is a medium-sized cockatoo that inhabits arid and semi-arid inland areas of Australia, though it is seen regularly in other climat ...
, have shorter, rounder wings and a more leisurely flight.[
]
Cockatoos have a large bill, which is kept sharp by rasping the two jaws together when resting. The bill is complemented by a large muscular tongue which helps manipulate seeds inside the bill so that they can be de-husked before eating. During the de-husking, the lower jaw applies the pressure, the tongue holds the seed in place and the upper jaw acts as an anvil. The eye region of the skull is reinforced to support muscles which move the jaws sideways.[ The bills of male cockatoos are generally slightly larger than those of their female counterparts, but this size difference is quite marked in the palm cockatoo.][.]
The plumage
Plumage ( "feather") is a layer of feathers that covers a bird and the pattern, colour, and arrangement of those feathers. The pattern and colours of plumage differ between species and subspecies and may vary with age classes. Within species, ...
of the cockatoos is less brightly coloured than that of the other parrots, with species generally being either black, grey or white. Many species have smaller areas of colour on their plumage, often yellow, pink and red, usually on the crest or tail. The galah and Major Mitchell's cockatoo are more broadly coloured in pink tones.[.] Several species have a brightly coloured bare area around the eye and face known as a periophthalmic ring; the large red patch of bare skin of the palm cockatoo is the most extensive and covers some of the face, while it is more restricted in some other species of white cockatoo, notably the corellas and blue-eyed cockatoo
The blue-eyed cockatoo (''Cacatua ophthalmica'') is a large, mainly white cockatoo about long with a mobile crest, a black beak, and a light blue rim of featherless skin around each eye that gives this species its name.
Like all cockatoos and m ...
.[ The plumage of males and females is similar in most species. The plumage of the female cockatiel is duller than the male, but the most marked ]sexual dimorphism
Sexual dimorphism is the condition where the sexes of the same animal and/or plant species exhibit different morphological characteristics, particularly characteristics not directly involved in reproduction. The condition occurs in most ani ...
occurs in the gang-gang cockatoo and the two species of black cockatoos in the subgenus ''Calyptorhynchus'', namely the red-tailed and glossy black cockatoo
The glossy black cockatoo (''Calyptorhynchus lathami''), is the smallest member of the subfamily Calyptorhynchinae found in eastern Australia. Adult glossy black cockatoos may reach in length. They are sexually dimorphic. Males are blackish bro ...
s.[ The ]iris
Iris most often refers to:
*Iris (anatomy), part of the eye
*Iris (mythology), a Greek goddess
* ''Iris'' (plant), a genus of flowering plants
* Iris (color), an ambiguous color term
Iris or IRIS may also refer to:
Arts and media
Fictional ent ...
colour differs in a few species, being pink or red in the female galah and Major Mitchell's cockatoo and red-brown in some other female white cockatoo species. The males all have dark brown irises.[
]
Cockatoos maintain their plumage with frequent preening
Preening is a found in birds that involves the use of the beak to position feathers, interlock feather that have become separated, clean plumage, and keep ectoparasites in check. Feathers contribute significantly to a bird's insulation, waterp ...
throughout the day. They remove dirt and oil and realign feather barbs by nibbling their feathers. They also preen other birds' feathers that are otherwise hard to get at. Cockatoos produce preen-oil from a gland
In animals, a gland is a group of cells in an animal's body that synthesizes substances (such as hormones) for release into the bloodstream (endocrine gland) or into cavities inside the body or its outer surface (exocrine gland).
Structure
De ...
on their lower back and apply it by wiping their plumage with their heads or already oiled feathers. Powder-down is produced by specialised feathers in the lumbar region and distributed by the preening cockatoo all over the plumage.[.]
Moulting
In biology, moulting (British English), or molting (American English), also known as sloughing, shedding, or in many invertebrates, ecdysis, is the manner in which an animal routinely casts off a part of its body (often, but not always, an outer ...
is very slow and complex. Black cockatoos appear to replace their flight feather
Flight feathers (''Pennae volatus'') are the long, stiff, asymmetrically shaped, but symmetrically paired pennaceous feathers on the wings or tail of a bird; those on the wings are called remiges (), singular remex (), while those on the tail ...
s one at a time, their moult taking two years to complete. This process is much shorter in other species, such as the galah and long-billed corella
The long-billed corella or slender-billed corella (''Cacatua tenuirostris'') is a cockatoo native to Australia, which is similar in appearance to the little corella. This species is mostly white, with a reddish-pink face and forehead, and has a lo ...
, which each take around six months to replace all their flight feathers.[
]
Voice
The vocalisations of cockatoos are loud and harsh. They serve a number of functions, including allowing individuals to recognize one another, alerting others of predators, indicating individual moods, maintaining the cohesion of a flock and as warnings when defending nests. The use of calls and number of specific calls varies by species; the Carnaby's black cockatoo has as many as 15 types of call, whereas others, such as Major Mitchell's cockatoo, have fewer. Some, like the gang-gang cockatoo, are comparatively quiet but do have softer growling calls when feeding. In addition to vocalisations, palm cockatoos communicate over large distances by drumming on a dead branch with a stick. Cockatoo species also make a characteristic hissing sound when threatened.[
]
Distribution and habitat
Cockatoos have a much more restricted range than the true parrots, occurring naturally only in Australia
Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...
, Indonesia
Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
, the Philippines
The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no),
* bik, Republika kan Filipinas
* ceb, Republika sa Pilipinas
* cbk, República de Filipinas
* hil, Republ ...
, and some Pacific regions. Eleven of the 21 species exist in the wild only in Australia, while seven species occur only in the islands of the Philippines
The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no),
* bik, Republika kan Filipinas
* ceb, Republika sa Pilipinas
* cbk, República de Filipinas
* hil, Republ ...
, Indonesia, Papua New Guinea
Papua New Guinea (abbreviated PNG; , ; tpi, Papua Niugini; ho, Papua Niu Gini), officially the Independent State of Papua New Guinea ( tpi, Independen Stet bilong Papua Niugini; ho, Independen Stet bilong Papua Niu Gini), is a country i ...
and the Solomon Islands
Solomon Islands is an island country consisting of six major islands and over 900 smaller islands in Oceania, to the east of Papua New Guinea and north-west of Vanuatu. It has a land area of , and a population of approx. 700,000. Its capita ...
. No cockatoo species are found in Borneo
Borneo (; id, Kalimantan) is the third-largest island in the world and the largest in Asia. At the geographic centre of Maritime Southeast Asia, in relation to major Indonesian islands, it is located north of Java, west of Sulawesi, and eas ...
, despite their presence on nearby Palawan
Palawan (), officially the Province of Palawan ( cyo, Probinsya i'ang Palawan; tl, Lalawigan ng Palawan), is an archipelagic province of the Philippines that is located in the region of Mimaropa. It is the largest province in the country in ...
and Sulawesi
Sulawesi (), also known as Celebes (), is an island in Indonesia. One of the four Greater Sunda Islands, and the world's eleventh-largest island, it is situated east of Borneo, west of the Maluku Islands, and south of Mindanao and the Sulu Ar ...
or many Pacific islands, although fossil remains have been recorded from New Caledonia
)
, anthem = ""
, image_map = New Caledonia on the globe (small islands magnified) (Polynesia centered).svg
, map_alt = Location of New Caledonia
, map_caption = Location of New Caledonia
, mapsize = 290px
, subdivision_type = Sovereign st ...
.
Three species occur in both New Guinea and Australia. Some species have widespread distributions, with the galah, for example, occurring over most of Australia, whereas other species have tiny distributions, confined to a small part of the continent, such as the Baudin's black cockatoo
Baudin's black cockatoo (''Zanda baudinii''), also known as Baudin's cockatoo or the long-billed black cockatoo, is a species of genus '' Zanda'' found in southwest Australia. The epithet commemorates the French explorer Nicolas Baudin. It has ...
of Western Australia or to a small island group, such as the Tanimbar corella
The Tanimbar corella (''Cacatua goffiniana''), also known as Goffin's cockatoo, is a species of cockatoo endemic to forests of Yamdena, Larat and Selaru, all islands in the Tanimbar Islands archipelago in Indonesia. It has been introduced to t ...
, which is restricted to the Tanimbar Islands
The Tanimbar Islands, also called ''Timur Laut'', are a group of about 65 islands in the Maluku (province), Maluku Provinces of Indonesia, province of Indonesia. The largest and most central of the islands is Yamdena; others include Selaru to t ...
of Indonesia. Some cockatoos have been introduced accidentally to areas outside their natural range such as New Zealand, Singapore, and Palau
Palau,, officially the Republic of Palau and historically ''Belau'', ''Palaos'' or ''Pelew'', is an island country and microstate in the western Pacific. The nation has approximately 340 islands and connects the western chain of the Caro ...
, while two Australian corella species have been introduced to parts of the continent where they are not native.
Cockatoos occupy a wide range of habitats from forests in subalpine regions to mangroves. However, no species is found in all types of habitat. The most widespread species, such as the galah and cockatiel,[ are open-country specialists that feed on grass seeds.] They are often highly mobile fast flyers and are nomadic. Flocks of birds move across large areas of the inland, locating and feeding on seed and other food sources. Drought may force flocks from more arid areas to move further into farming areas.[.] Other cockatoo species, such as the glossy black cockatoo, inhabit woodlands, rainforests, shrublands and even alpine forests. The red-vented cockatoo
The red-vented cockatoo (''Cacatua haematuropygia''), also known as the Philippine cockatoo and locally katala, abukay, agay or kalangay, is a species of cockatoo. It is endemic to the Philippines though pressured by various environmental degradat ...
inhabits mangroves and its absence from northern Luzon
Luzon (; ) is the largest and most populous island in the Philippines. Located in the northern portion of the Philippines archipelago, it is the economic and political center of the nation, being home to the country's capital city, Manila, as ...
may be related to the lack of mangrove forests there. Forest-dwelling cockatoos are generally sedentary, as the food supply is more stable and predictable.[.] Several species have adapted well to human modified habitats and are found in agricultural areas and even busy cities.
Behaviour
Cockatoos are diurnal and require daylight to find their food. They are not early risers, instead waiting until the sun has warmed their roosting sites before feeding. All species are generally highly social and roost, forage and travel in colourful and noisy flocks
Flocking is the behaviour exhibited when a group of birds, called a flock, are foraging or in flight.
Computer simulations and mathematical models that have been developed to emulate the flocking behaviours of birds can also generally be applie ...
. These vary in size depending on availability of food; in times of plenty, flocks are small and number a hundred birds or less, while in droughts or other times of adversity, they may swell up to contain thousands or even tens of thousands of birds; one record from the Kimberley noted a flock of 32,000 little corella
The little corella (''Cacatua sanguinea''), also known as the short-billed corella, bare-eyed cockatoo, blood-stained cockatoo, and little cockatoo is a white cockatoo native to Australia and southern New Guinea. It was known as ''Birdirra'' amo ...
s. Species that inhabit open country form larger flocks than those of forested areas.[.]
Some species require roosting sites that are located near drinking sites; other species travel great distances between the roosting and feeding sites. Cockatoos have several characteristic methods of bathing; they may hang upside down or fly about in the rain or flutter in wet leaves in the canopy. Cockatoos have a preferred "footedness" analogous to human handedness. Most species are left-footed with 87–100% of individuals using their left feet to eat, but a few species favor their right foot.
Breeding
Cockatoos are monogamous
Monogamy ( ) is a form of Dyad (sociology), dyadic Intimate relationship, relationship in which an individual has only one Significant other, partner during their lifetime. Alternately, only one partner at any one time (Monogamy#Serial monogamy, ...
breeders, with pair bond
In biology, a pair bond is the strong affinity that develops in some species between a mating pair, often leading to the production and rearing of offspring and potentially a lifelong bond. Pair-bonding is a term coined in the 1940s that is freque ...
s that can last many years. Many birds pair up in flocks before they reach sexual maturity and delay breeding for a year at least. Females breed for the first time anywhere from three to seven years of age and males are often older. Sexual maturity is delayed so birds can develop the skills for raising and parenting young, which is prolonged compared with other birds; the young of some species remain with their parents for up to a year.[.] Cockatoos may also display site fidelity
Philopatry is the tendency of an organism to stay in or habitually return to a particular area. The causes of philopatry are numerous, but natal philopatry, where animals return to their birthplace to breed, may be the most common. The term derives ...
, returning to the same nesting sites in consecutive years. Courtship is generally simple, particularly for established pairs, with the black cockatoos alone engaging in courtship feeding
A nuptial gift is a nutritional gift given by one partner in some animals' sexual reproduction practices.
Formally, a nuptial gift is a material presentation to a recipient by a donor during or in relation to sexual intercourse that is not simp ...
. Established pairs do engage in preening each other, but all forms of courtship drop off after incubation begins, possibly due to the strength of the pair-bond.
Like most parrots, the cockatoos are cavity nesters, nesting in holes in trees, which they are unable to excavate themselves. These hollows are formed from decay or destruction of wood by branches breaking off, fungi or insects such as termites or even woodpecker
Woodpeckers are part of the bird family Picidae, which also includes the piculets, wrynecks, and sapsuckers. Members of this family are found worldwide, except for Australia, New Guinea, New Zealand, Madagascar, and the extreme polar regions. ...
s where their ranges overlap. In many places these holes are scarce and the source of competition, both with other members of the same species and with other species and types of animal. In general, cockatoos choose hollows only a little larger than themselves, hence different-sized species nest in holes of corresponding (and different) sizes. If given the opportunity, cockatoos prefer nesting over above the ground[ and close to water and food.][.]
The nesting hollows are lined with sticks, wood chips and branches with leaves. The eggs of cockatoos are oval and initially white, as their location makes camouflage unnecessary.[.] However, they do become discoloured over the course of incubation. They range in size from in the palm and red-tailed black cockatoos, to in the cockatiel.[ ]Clutch
A clutch is a mechanical device that engages and disengages power transmission, especially from a drive shaft to a driven shaft. In the simplest application, clutches connect and disconnect two rotating shafts (drive shafts or line shafts). ...
size varies within the family, with the palm cockatoo and some other larger cockatoos laying only a single egg and the smaller species laying anywhere between two and eight eggs. Food supply also plays a role in clutch size
__NOTOC__
A clutch of egg (biology), eggs is the group of eggs produced by birds, amphibians, or reptiles, often at a single time, particularly those laid in a nest.
In birds, destruction of a clutch by predators (or removal by humans, for exam ...
. Some species can lay a second clutch if the first fails. Around 20% of eggs laid are infertile.[.] The cockatoos' incubation and brooding responsibilities may either be undertaken by the female alone in the case of the black cockatoos or shared amongst the sexes as happens in the other species. In the case of the black cockatoos, the female is provisioned by the male several times a day. The young of all species are born covered in yellowish down, bar the palm cockatoo, whose young are born naked.[.] Cockatoo incubation times are dependent on species size, with the smaller cockatiels having a period of around 20 days and the larger Carnaby's black cockatoo incubating its eggs for up to 29 days.
The nestling
Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight s ...
period also varies by species size, with larger species having longer nestling periods. It is also affected by season and environmental factors and by competition with siblings in species with clutch sizes greater than one. Much of what is known about the nestling period of some species is dependent on aviary studies – aviary cockatiels can fledge
Fledging is the stage in a flying animal's life between hatching or birth and becoming capable of flight.
This term is most frequently applied to birds, but is also used for bats. For altricial birds, those that spend more time in vulnerable c ...
after 5 weeks and the large palm cockatoos after 11 weeks. During this period, the young become covered in juvenile plumage while remaining in the hollow. Wings and tail feathers are slow to grow initially but more rapid as the primary feathers appear. Nestlings quickly reach about 80–90% of adult weight about two-thirds of the time through this period, plateauing before they leave the hollow; they fledge at this weight with wing and tail feathers still to grow a little before reaching adult dimensions.[.] Growth rate of the young, as well as numbers fledged, are adversely impacted by reduced food supply and poor weather conditions.[.]
Diet and feeding
Cockatoos are versatile feeders and consume a range of mainly vegetable food items. Seeds form a large part of the diet of all species; these are opened with their large and powerful bills. The galahs, corellas and some of the black cockatoos feed primarily on the ground; others feed mostly in trees. The ground-feeding species tend to forage in flocks, which form tight, squabbling groups where seeds are concentrated and dispersed lines where food is more sparsely distributed;[.] they also prefer open areas where visibility is good. The western
Western may refer to:
Places
*Western, Nebraska, a village in the US
*Western, New York, a town in the US
*Western Creek, Tasmania, a locality in Australia
*Western Junction, Tasmania, a locality in Australia
*Western world, countries that id ...
and long-billed corellas have elongated bills to excavate tubers and roots and the Major Mitchell's cockatoo walks in a circle around the doublegree (''Emex australis
''Rumex hypogaeus'' (Synonym (taxonomy), synonym ''Emex australis''), commonly known in English as southern threecornerjack, devil's thorn, or double gee (also doublegee, from the old Afrikaner name dubbeltge-doorn - 'double thorned'), is a herb ...
'') to twist out and remove the underground parts.[.]
Many species forage for food in the canopy of trees, taking advantage of serotiny
Serotiny in botany simply means 'following' or 'later'.
In the case of serotinous flowers, it means flowers which grow following the growth of leaves, or even more simply, flowering later in the season than is customary with allied species. Havi ...
(the storage of a large supply of seed in cones or gumnuts by plant genera such as ''Eucalyptus
''Eucalyptus'' () is a genus of over seven hundred species of flowering trees, shrubs or mallees in the myrtle family, Myrtaceae. Along with several other genera in the tribe Eucalypteae, including '' Corymbia'', they are commonly known as euca ...
'', ''Banksia
''Banksia'' is a genus of around 170 species in the plant family Proteaceae. These Australian wildflowers and popular garden plants are easily recognised by their characteristic flower spikes, and fruiting "cones" and heads. ''Banksias'' range i ...
'' and ''Hakea
''Hakea'' ( ) is a genus of about 150 species of plants in the Family ''Proteaceae'', endemic to Australia. They are shrubs or small trees with leaves that are sometimes flat, otherwise circular in cross section in which case they are sometimes d ...
''), a natural feature of the Australian landscape in dryer regions. These woody fruiting bodies are inaccessible to many species and harvested in the main by parrots, cockatoos and rodents in more tropical regions. The larger cones can be opened by the large bills of cockatoos but are too strong for smaller animals.[.] Many nuts and fruits lie on the end of small branches which are unable to support the weight of the foraging cockatoo, which instead bends the branch towards itself and holds it with its foot.[.]
While some cockatoos are generalists taking a wide range of foods, others are specialists. The glossy black cockatoo specialises in the cones of trees of the genus ''Allocasuarina
''Allocasuarina'' is a genus of trees in the flowering plant family Casuarinaceae. They are endemic to Australia, occurring primarily in the south. Like the closely related genus ''Casuarina'', they are commonly called sheoaks or she-oaks.
Wi ...
'', preferring a single species, '' A. verticillata''. It holds the cones in its foot and shreds them with its powerful bill before removing the seeds with its tongue. Some species take large numbers of insects, particularly when breeding; in fact the bulk of the yellow-tailed black cockatoo
The yellow-tailed black cockatoo (''Zanda funerea'') is a large cockatoo native to the south-east of Australia measuring in length. It has a short crest on the top of its head. Its plumage is mostly brownish black and it has prominent yello ...
's diet is made up of insects. The large bill is used in order to extract grubs and larvae from rotting wood. The amount of time cockatoos have to spend foraging varies with the season.[ During times of plenty they may need to feed for only a few hours in the day, in the morning and evening, then spend the rest of the day roosting or preening in trees, but during the winter most of the day may be spent foraging. The birds have increased nutritional requirements during the breeding season, so they spend more time foraging for food during this time. Cockatoos have large ]crops
A crop is a plant that can be grown and harvested extensively for profit or subsistence. When the plants of the same kind are cultivated at one place on a large scale, it is called a crop. Most crops are cultivated in agriculture or hydroponics ...
, which allow them to store and digest food for some time after retiring to a tree.[.]
Predators and threats
The peregrine falcon
The peregrine falcon (''Falco peregrinus''), also known as the peregrine, and historically as the duck hawk in North America, is a Cosmopolitan distribution, cosmopolitan bird of prey (Bird of prey, raptor) in the family (biology), family Falco ...
and little eagle
The little eagle (''Hieraaetus morphnoides'') is a very small eagle native to Australia, measuring 45–55 cm (17–21.5 inches) in length and weighing 815 g (1.8 lb), roughly the size of a peregrine falcon. It tends to inhabit open w ...
have been reported taking galahs and the wedge-tailed eagle
The wedge-tailed eagle (''Aquila audax'') is the largest bird of prey in the continent of Australia. It is also found in southern New Guinea to the north and is distributed as far south as the state of Tasmania. Adults of this species have lon ...
has been observed killing a sulphur-crested cockatoo.[ Eggs and nestlings are vulnerable to many hazards. Various species of monitor lizard ('' Varanus'') are able to climb trees and enter hollows. Other predators recorded include the ]spotted wood owl
The spotted wood owl (''Strix seloputo'') is an owl of the earless owl genus, ''Strix''. Its range is disjunct; it occurs in many regions surrounding Borneo, but not on that island itself.
Description
The spotted wood owl grows to a length of ...
on Rasa Island in the Philippines; the amethystine python
The amethystine python ('' Simalia amethistina'', formerly known as ''Morelia amethistina''), also known as the scrub python or ''sanca permata'' in Indonesian, is a species of non-venomous snake in the family Pythonidae. The species is found ...
, black butcherbird
The black butcherbird (''Melloria quoyi'', also known as ''Cracticus quoyi'') is a species of butcherbird in the family Artamidae.
It is found in Australia, Indonesia, and Papua New Guinea.
Its natural habitats are subtropical or tropical dry ...
and rodents including the giant white-tailed rat
The giant white-tailed rat (''Uromys caudimaculatus'') is an Australian rodent native to tropical rainforest of north Queensland, with subspecies occurring in New Guinea and the Aru Islands. It is one of the largest rodents in Australia, reaching ...
in Cape York; and brushtail possum
The brushtail possums are the members of the genus ''Trichosurus'' in the Phalangeridae, a family of marsupials. They are native to Australia (including Tasmania) and some small nearby islands. Unique among marsupials, they have shifted the hypax ...
on Kangaroo Island. Furthermore, galahs and little corellas competing for nesting space with the glossy black cockatoo on Kangaroo Island have been recorded killing nestlings of the latter species there. Severe storms may also flood hollows drowning the young and termite or borer activity may lead to the internal collapse of nests.[.]
Like other parrots, cockatoos can be afflicted by psittacine beak and feather disease
Psittacine beak and feather disease (PBFD) is a viral disease affecting all Old World and New World parrots. The causative virus—''beak and feather disease virus'' (BFDV)—belongs to the taxonomic genus ''Circovirus'', family ''Circoviridae ...
(PBFD). The viral infection causes feather loss and beak malformation and reduces the bird's overall immunity. Particularly prevalent in sulphur-crested cockatoos, little corellas and galahs, it has been recorded in 14 species of cockatoo to date. Although unlikely to significantly impact on large, healthy populations of birds in the wild, PBFD may pose a high risk to smaller stressed populations.
A white cockatoo
The white cockatoo (''Cacatua alba''), also known as the umbrella cockatoo, is a medium-sized all-white cockatoo endemic to tropical rainforest on islands of Indonesia. When surprised, it extends a large and striking head crest, which has a sem ...
and a sulphur-crested cockatoo were found to be infected with the protozoon ''Haemoproteus
''Haemoproteus'' is a genus of alveolates that are parasitic in birds, reptiles and amphibians. Its name is derived from Greek: ''Haima'', "blood", and ''Proteus'', a sea god who had the power of assuming different shapes. The name ''Haemoproteu ...
'' and another sulphur-crested cockatoo had the malaria
Malaria is a mosquito-borne infectious disease that affects humans and other animals. Malaria causes symptoms that typically include fever, tiredness, vomiting, and headaches. In severe cases, it can cause jaundice, seizures, coma, or death. S ...
parasite ''Plasmodium
''Plasmodium'' is a genus of unicellular eukaryotes that are obligate parasites of vertebrates and insects. The life cycles of ''Plasmodium'' species involve development in a blood-feeding insect host which then injects parasites into a vert ...
'' on analysis of faecal samples at Almuñecar ornithological garden in Granada
Granada (,, DIN 31635, DIN: ; grc, Ἐλιβύργη, Elibýrgē; la, Illiberis or . ) is the capital city of the province of Granada, in the autonomous communities of Spain, autonomous community of Andalusia, Spain. Granada is located at the fo ...
in Spain. Like amazon parrots and macaws, cockatoos frequently develop cloacal papilloma
A papilloma (plural papillomas or papillomata) ('' papillo-'' + '' -oma'') is a benign epithelial tumor growing exophytically (outwardly projecting) in nipple-like and often finger-like fronds. In this context, papilla refers to the projection cre ...
s. The relationship with malignancy is unknown, as is the cause, although a parrot papilloma virus
''Papillomaviridae'' is a family of non- enveloped DNA viruses whose members are known as papillomaviruses. Several hundred species of papillomaviruses, traditionally referred to as "types", have been identified infecting all carefully inspected ...
has been isolated from a grey parrot
The grey parrot (''Psittacus erithacus''), also known as the Congo grey parrot, Congo African grey parrot or African grey parrot, is an Old World parrot in the family Psittacidae. The Timneh parrot ''(Psittacus timneh)'' once was identified as ...
with the condition.
Social learning
Cockatoos have been shown to learn new skills through social interaction. In New South Wales
)
, nickname =
, image_map = New South Wales in Australia.svg
, map_caption = Location of New South Wales in AustraliaCoordinates:
, subdivision_type = Country
, subdivision_name = Australia
, established_title = Before federation
, es ...
, researchers and citizen scientists were able to track the spread of lid-flipping skills as cockatoos
A cockatoo is any of the 21 parrot species belonging to the family Cacatuidae, the only family in the superfamily Cacatuoidea. Along with the Psittacoidea (true parrots) and the Strigopoidea (large New Zealand parrots), they make up the ord ...
learned from each other to open garbage bins. Bin-opening spread more quickly to neighbouring suburbs than suburbs further away. In addition, birds in different areas developed their own variants for accomplishing the complex task.
Relationship with humans
Human activities have had positive effects on some species of cockatoo and negative effects on others. Many species of open country have benefited greatly from anthropogenic
Anthropogenic ("human" + "generating") is an adjective that may refer to:
* Anthropogeny, the study of the origins of humanity
Counterintuitively, anthropogenic may also refer to things that have been generated by humans, as follows:
* Human im ...
changes to the landscape, with the great increase in reliable seed food sources, available water and have also adapted well to a diet including foreign foodstuffs. This benefit appears to be restricted to Australian species, as cockatoos favouring open country outside Australia have not become more abundant. Predominantly forest-dwelling species have suffered greatly from habitat destruction
Habitat destruction (also termed habitat loss and habitat reduction) is the process by which a natural habitat becomes incapable of supporting its native species. The organisms that previously inhabited the site are displaced or dead, thereby ...
; in the main, they appear to have a more specialised diet and have not been able to incorporate exotic food into their diet. A notable exception is the yellow-tailed black cockatoo in eastern Australia.[.]
Pests
Several species of cockatoo can be serious agricultural pests
PESTS was an anonymous American activist group formed in 1986 to critique racism, tokenism, and exclusion in the art world. PESTS produced newsletters, posters, and other print material highlighting examples of discrimination in gallery represent ...
. They are sometimes controlled by shooting, poison
Poison is a chemical substance that has a detrimental effect to life. The term is used in a wide range of scientific fields and industries, where it is often specifically defined. It may also be applied colloquially or figuratively, with a broa ...
ing or capture followed by gassing. Non-lethal damage mitigation methods used include scaring, habitat manipulation and the provision of decoy food dumps or sacrifice crops to distract them from the main crop. They can be a nuisance in urban areas due to destruction of property. They maintain their bills in the wild by chewing on wood, but in suburbia, they may chew outdoor furniture, door and window frames; soft decorative timbers such as western red cedar are readily demolished.[.] Birds may also target external wiring and fixtures such as solar water heaters, television antennae and satellite dishes.[ A business in central Melbourne suffered as sulphur-crested cockatoos repeatedly stripped the silicone sealant from the plate glass windows.][.] Galahs and red-tailed black cockatoos have stripped electrical cabling in rural areas and tarpaulin is targeted elsewhere.[ Outside Australia, the Tanimbar corella is a pest on Yamdena Island where it raids maize crops.
]
In 1995 the Government
A government is the system or group of people governing an organized community, generally a state.
In the case of its broad associative definition, government normally consists of legislature, executive, and judiciary. Government is a ...
of the state
State may refer to:
Arts, entertainment, and media Literature
* ''State Magazine'', a monthly magazine published by the U.S. Department of State
* ''The State'' (newspaper), a daily newspaper in Columbia, South Carolina, United States
* ''Our S ...
of Victoria
Victoria most commonly refers to:
* Victoria (Australia), a state of the Commonwealth of Australia
* Victoria, British Columbia, provincial capital of British Columbia, Canada
* Victoria (mythology), Roman goddess of Victory
* Victoria, Seychelle ...
published a report on problems caused by long-billed corellas, sulphur-crested cockatoos and galahs, three species which, along with the little corella, have large and growing populations, having benefited from anthropogenic changes to the landscape. Subsequent to the findings and publication of the report, these three species were declared unprotected by a Governor in Council
The King-in-Council or the Queen-in-Council, depending on the gender of the reigning monarch, is a constitutional term in a number of states. In a general sense, it would mean the monarch exercising executive authority, usually in the form of ap ...
Order under certain conditions and are allowed to be killed where serious damage is being caused by them to trees, vineyards, orchards, recreational reserves and commercial crops. Damage covered by the report included not only that to cereal crops, fruit and nut orchards and some kinds of vegetable crops but also to houses and communications equipment. The little corella is a declared pest of agriculture in Western Australia, where it is an aviculturally introduced species. The birds damage sorghum
''Sorghum'' () is a genus of about 25 species of flowering plants in the grass family (Poaceae). Some of these species are grown as cereals for human consumption and some in pastures for animals. One species is grown for grain, while many othe ...
, maize, sunflower
The common sunflower (''Helianthus annuus'') is a large annual forb of the genus ''Helianthus'' grown as a crop for its edible oily seeds. Apart from cooking oil production, it is also used as livestock forage (as a meal or a silage plant), as ...
, chickpea
The chickpea or chick pea (''Cicer arietinum'') is an annual legume of the family Fabaceae, subfamily Faboideae. Its different types are variously known as gram" or Bengal gram, garbanzo or garbanzo bean, or Egyptian pea. Chickpea seeds are high ...
s and other crops. They also defoliate amenity trees in parks and gardens, dig for edible roots and corm
A corm, bulbo-tuber, or bulbotuber is a short, vertical, swollen underground plant stem that serves as a storage organ that some plants use to survive winter or other adverse conditions such as summer drought and heat (perennation).
The word ' ...
s on sports grounds and race track
A race track (racetrack, racing track or racing circuit) is a facility built for racing of vehicles, athletes, or animals (e.g. horse racing or greyhound racing). A race track also may feature grandstands or concourses. Race tracks are also u ...
s, as well as chew wiring and household fittings. In South Australia, where flocks can number several thousand birds and the species is listed as unprotected, they are accused of defoliating red gums and other native or ornamental trees used for roosting, damaging tarpaulin
A tarpaulin ( , ) or tarp is a large sheet of strong, flexible, water-resistant or waterproof material, often cloth such as canvas or polyester coated with polyurethane, or made of plastics such as polyethylene. Tarpaulins often have reinforced ...
s on grain bunkers, wiring and flashing on buildings, taking grain from newly seeded paddocks
A paddock is a small enclosure for horses. In the United Kingdom, this term also applies to a field for a general automobile racing competition, particularly Formula 1.
Description
In Canada and the United States of America, a paddock is a smal ...
and creating a noise nuisance.
Several rare species and subspecies, too, have been recorded as causing problems. The Carnaby's black cockatoo
Carnaby's black cockatoo (''Zanda latirostris''), also known as the short-billed black cockatoo, is a large black cockatoo endemic to southwest Australia. It was described in 1948 by naturalist Ivan Carnaby. Measuring in length, it has a s ...
, a threatened
Threatened species are any species (including animals, plants and fungi) which are vulnerable to endangerment in the near future. Species that are threatened are sometimes characterised by the population dynamics measure of ''critical depensat ...
Western Australian
Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to th ...
endemic
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...
, has been considered a pest in pine plantation
A plantation is an agricultural estate, generally centered on a plantation house, meant for farming that specializes in cash crops, usually mainly planted with a single crop, with perhaps ancillary areas for vegetables for eating and so on. The ...
s where the birds chew off the leading shoots of growing pine trees, resulting in bent trunks and reduced timber value. They are also known to damage nut and fruit crops, and have learnt to exploit canola
Close-up of canola blooms
Canola flower
Rapeseed oil is one of the oldest known vegetable oils. There are both edible and industrial forms produced from rapeseed, the seed of several cultivars of the plant family Brassicaceae. Historically, i ...
crops. The Baudin's black cockatoo, also endemic to the south-west of Western Australia, can be a pest in apple and pear orchard
An orchard is an intentional plantation of trees or shrubs that is maintained for food production. Orchards comprise fruit- or nut-producing trees which are generally grown for commercial production. Orchards are also sometimes a feature of larg ...
s where it destroys the fruit to extract the seeds.[ ]Muir's corella
Muir's corella (''Cacatua pastinator pastinator'') is a stocky, medium-sized white cockatoo endemic to Western Australia. It was the threatened nominate subspecies of the western corella.Anon. (2007). ''Muir’s Corella''. (Fauna Note No.4). Dep ...
, the nominate subspecies of the western corella, is also a declared pest of agriculture in Western Australia, as well as being nationally vulnerable and listed under state legislation as being "rare or likely to become extinct".
Status and conservation
According to the IUCN
The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of natu ...
and BirdLife International
BirdLife International is a global partnership of non-governmental organizations that strives to conserve birds and their habitats. BirdLife International's priorities include preventing extinction of bird species, identifying and safeguarding ...
, seven species of cockatoo are considered to be vulnerable or worse and one is considered to be near-threatened
A near-threatened species is a species which has been categorized as "Near Threatened" (NT) by the International Union for Conservation of Nature as that may be vulnerable to endangerment in the near future, but it does not currently qualify fo ...
. Of these, two species—the red-vented cockatoo and the yellow-crested cockatoo
The yellow-crested cockatoo (''Cacatua sulphurea'') also known as the lesser sulphur-crested cockatoo, is a medium-sized (about 34-cm-long) cockatoo with white plumage, bluish-white bare orbital skin, grey feet, a black bill, and a retractile y ...
—are considered to be critically endangered.
The principal threats to cockatoos are habitat loss
Habitat destruction (also termed habitat loss and habitat reduction) is the process by which a natural habitat becomes incapable of supporting its native species. The organisms that previously inhabited the site are displaced or dead, thereby ...
and the wildlife trade
Wildlife trade refers to the of products that are derived from non-domesticated animals or plants usually extracted from their natural environment or raised under controlled conditions. It can involve the trade of living or dead individuals, ti ...
. All cockatoos are dependent on trees for nesting and are vulnerable to their loss; in addition many species have specialised habitat requirements or live on small islands and have naturally small ranges, making them vulnerable to the loss of these habitats. Cockatoos are popular as pets and the capture and trade has threatened some species; between 1983 and 1990, 66,654 recorded salmon-crested cockatoo
The salmon-crested cockatoo (''Cacatua moluccensis''), also known as the Moluccan cockatoo, is a cockatoo endemic to the Seram archipelago in eastern Indonesia. At a height of up to and weight of up to , it is among the largest of the white co ...
s were exported from Indonesia
Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
, a figure that does not include the number of birds caught for the domestic trade or that were exported illegally. The capture of many species has subsequently been banned but the trade continues illegally. Birds are put in crates or bamboo tubing and conveyed on boats out of Indonesia and the Philippines.[.] Not only are the rare species smuggled out of Indonesia but also common and rare cockatoos alike are smuggled out of Australia; birds are sedated, covered in nylon stockings and packed into PVC tubing which is then placed in unaccompanied luggage on international flights.[ Mortality is significant (30%) and eggs, more easily hidden on the bodies of smugglers on flights, are increasingly smuggled instead. Trafficking is thought to be run by organised gangs, who also trade Australian species for overseas species such as macaws coming the other way.][.]
All species of cockatoo except the cockatiel are protected by the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES
CITES (shorter name for the Convention on International Trade in Endangered Species of Wild Fauna and Flora, also known as the Washington Convention) is a multilateral treaty to protect endangered plants and animals from the threats of interna ...
), which restricts import and export of wild-caught parrots to special licensed purposes. Five cockatoo species (including all subspecies)—the Tanimbar corella (''Cacatua goffiniana''), red-vented cockatoo (''Cacatua haematuropygia''), Moluccan cockatoo (''Cacatua moluccensis''), yellow-crested cockatoo (''Cacatua sulphurea'') and palm cockatoo (''Probosciger aterrimus'')—are protected on the CITES Appendix I list. With the exception of the cockatiel, all remaining cockatoo species are protected on the CITES Appendix II list.
Aviculture
Kept for their appearance, their intelligence and engaging personalities, cockatoos can nonetheless be problematic pets or companion parrot
A companion parrot is a parrot kept as a pet that interacts abundantly with its human counterpart. Generally, most species of parrot can make excellent companions, but must be carefully managed around other common pet species like dogs and cats a ...
s.[ Generally, they are not good at mimicking human speech,] although the little corella is a renowned talker. As social animals, wild cockatoos have been known to learn human speech from ex-captive birds that have integrated into a flock. Their care is best provided by those experienced in keeping parrots.[ Cockatoos are social animals and their social needs are difficult to cater for,] and they can suffer if kept in a cage on their own for long periods of time.
The cockatiel is by far the cockatoo species most frequently kept in captivity. Among U.S. bird keepers that participated in a survey by APPMA in 2003/04, 39% had cockatiels, as opposed to only 3% that had (other) cockatoo species. The white cockatoos are more often encountered in aviculture than the black cockatoos. Black cockatoos are rarely seen in European zoos due to export restrictions on Australian wildlife but birds seized by governments have been loaned.
Cockatoos are often very affectionate with their owner and at times other people but can demand a great deal of attention. It has been suggested that cockatoos' need for physical attention from humans may stem from suboptimal rearing techniques – young birds being removed from parental care for hand-rearing too early in the belief that this will produce a more suitable pet, leading the bird to seek out physical contact from humans as a parent substitute. Furthermore, their intense curiosity means they must be given a steady supply of objects to tinker with, chew, dismantle and destroy. Parrots in captivity may suffer from boredom, which can lead to stereotypic behaviour patterns, such as feather-plucking
Feather-plucking, sometimes termed feather-picking, feather damaging behaviour or pterotillomania, is a maladaptive, behavioural disorder commonly seen in captive birds that chew, bite or pluck their own feathers with their beak, resulting in da ...
. Feather plucking is likely to stem from psychological rather than physical causes. Other major drawbacks include their painful bites,[.] and their piercing screeches. The salmon-crested and white cockatoo species are particular offenders. All cockatoos have a fine powder
A powder is a dry, bulk solid composed of many very fine particles that may flow freely when shaken or tilted. Powders are a special sub-class of granular materials, although the terms ''powder'' and ''granular'' are sometimes used to distin ...
on their feathers, which may induce allergies
Allergies, also known as allergic diseases, refer a number of conditions caused by the hypersensitivity of the immune system to typically harmless substances in the environment. These diseases include hay fever, food allergies, atopic derma ...
in certain people.[ In general, the smaller cockatoo species such as Goffin's and quieter Galah's cockatoos are much easier to keep as pets. The cockatiel is one of the most popular and easiest parrots to keep as a pet, and many colour mutations are available in aviculture.]
Larger cockatoos can live 30 to 70 years depending on the species, or occasionally longer, and cockatiels can live for about 20 years. As pets they require a long-term commitment from their owners. Their longevity is considered a positive trait as it reduces instances of the loss of a pet. The oldest cockatoo in captivity was a Major Mitchell's cockatoo named Cookie
A cookie is a baked or cooked snack or dessert that is typically small, flat and sweet. It usually contains flour, sugar, egg, and some type of oil, fat, or butter. It may include other ingredients such as raisins, oats, chocolate chips, n ...
, residing at Brookfield Zoo
Brookfield Zoo, also known as the Chicago Zoological Park, is a zoo located in the Chicago suburb of Brookfield, Illinois. It houses around 450 species of animals in an area of . It opened on July 1, 1934, and quickly gained international recogni ...
in Chicago, which lived to be 83 years old (1933–2016). A salmon-crested cockatoo named King Tut who resided at San Diego Zoo
The San Diego Zoo is a zoo in Balboa Park, San Diego, California, housing 4000 animals of more than 650 species and subspecies on of Balboa Park leased from the City of San Diego. Its parent organization, San Diego Zoo Wildlife Alliance, is a p ...
was nearly 69 when he died in 1990 and a palm cockatoo reached 56 in London Zoo
London Zoo, also known as ZSL London Zoo or London Zoological Gardens is the world's oldest scientific zoo. It was opened in London on 27 April 1828, and was originally intended to be used as a collection for science, scientific study. In 1831 o ...
in 2000. However, anecdotal reports describe birds of much greater ages.[ Cocky Bennett of Tom Ugly's Point in Sydney was a celebrated sulphur-crested cockatoo who was reported to have reached an age of 100 years or more. He had lost his feathers and was naked for much of his life. A palm cockatoo was reported to have reached 80 or 90 years of age in an Australian zoo,] and a little corella that was removed from a nest in central Australia in 1904 was reported still alive in the late 1970s. In February 2010, a white cockatoo named Arthur was claimed to be 90 years old; he had lived with a family for generations in Dalaguete
Dalaguete, officially the Municipality of Dalaguete ( ceb, Lungsod sa Dalaguete; tgl, Bayan ng Dalaguete), is a 1st class municipality in the province of Cebu, Philippines. According to the 2020 census, it has a population of 74,596 people.
Lo ...
, Cebu
Cebu (; ceb, Sugbo), officially the Province of Cebu ( ceb, Lalawigan sa Sugbo; tl, Lalawigan ng Cebu; hil, Kapuroan sang Sugbo), is a province of the Philippines located in the Central Visayas region, and consists of a main island and 167 ...
, before being taken to Cebu City
Cebu City, officially the City of Cebu ( ceb, Dakbayan sa Sugbo; fil, Lungsod ng Cebu; hil, Dakbanwa sang Sugbo), is a 1st class Cities of the Philippines#Legal classification, highly urbanized city in the Central Visayas Regions of the P ...
Zoo.
Trained cockatoos are sometimes seen in bird shows in zoos. They are generally less motivated by food than other birds; some may more respond to petting or praise than food. Cockatoos can often be taught to wear a parrot harness, enabling their owners to take them outdoors. Cockatoos have been used in animal-assisted therapy, generally in nursing homes.
Cockatoos often have pronounced responses to musical sounds and numerous videos exist showing the birds dancing to popular music. Research conducted in 2008 with an Eleonora cockatoo named Snowball (cockatoo), Snowball had indicated that this particular individual is indeed capable of Entrainment (biomusicology), beat induction—perceiving human-created music and synchronizing his body movements to the beat.
Culture
The earliest European depiction of a cockatoo is in the falconry book ''De arte venandi cum avibus'', written by Frederick II, Holy Roman Emperor. The next European depiction of a cockatoo, previously thought to be the earliest, is present in the 1496 painting by Andrea Mantegna titled Madonna della Vittoria. Later examples were painted by Hungarian artist Jakob Bogdani (1660–1724), who resided in Amsterdam from 1683 and then England, and appeared with numerous other birds in the bird pieces of the Dutch painter Melchior d'Hondecoeter (1636–1695). A cockatoo is the unlucky subject in ''An Experiment on a Bird in the Air Pump'' by English artist Joseph Wright of Derby, its fate unclear in the painting. Cockatoos were among the many Australian plants and animals which featured in decorative motifs in Federation architecture of the early 20th century. A visit to a Camden Town pet shop in 1958 inspired English painter William Roberts to paint ''The Cockatoos'', in the collection of the Tate Gallery. American artist and sculptor Joseph Cornell was known for placing cutout paper cockatoos in his works.
The Australian Capital Territory Legislative Assembly, government of the Australian Capital Territory adopted the gang-gang cockatoo as its official faunal emblem on 27 February 1997. The short-lived budget airline Impulse Airlines featured a sulphur-crested cockatoo on its corporate livery (and aeroplanes). The palm cockatoo, which has a unique beak and face colouration, is used as a symbol by the World Parrot Trust.
Two 1970s police dramas featured protagonists with pet cockatoos. In the 1973 film ''Serpico'', Al Pacino's character had a pet white cockatoo and the television show ''Baretta'' saw Robert Blake (actor), Robert Blake's character with Fred the Triton cockatoo. The popularity of the latter show saw a corresponding rise in popularity of cockatoos as pets in the late 1970s. Cockatoos have been used frequently in advertising; a cockatoo appeared in a 'cheeky' (and later toned-down) 2008 advertising campaign for Cockatoo Ridge Wineries.
Intelligence
A team of scientists from Oxford University, the University of Vienna and the Max Planck Society, Max Planck Institute conducted tests on ten untrained Tanimbar corella
The Tanimbar corella (''Cacatua goffiniana''), also known as Goffin's cockatoo, is a species of cockatoo endemic to forests of Yamdena, Larat and Selaru, all islands in the Tanimbar Islands archipelago in Indonesia. It has been introduced to t ...
s (''Cacatua goffini''), and found that they were able to solve complex mechanical puzzles.
Notes
References
Cited texts
*
*
*
*
*
*
*
External links
Australian Faunal Directory
MyToos.com
– explaining many of the responsibilities of cockatoo ownership
Cockatoo videos
on the Internet Bird Collection
{{Authority control
Cacatuidae,
Parrots
Birds of Oceania,
Taxa named by George Robert Gray