The

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

''Nestor'' is the type and only

extant Extant is the opposite of the word extinct. It may refer to: * Extant hereditary titles * Extant literature, surviving literature, such as ''Beowulf'', the oldest extant manuscript written in English * Extant taxon, a taxon which is not extinct, ...

genus of the

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 ...

family Nestoridae. Together with the

kākāpō The kākāpō ( ; ; from the mi, kākāpō, , night parrot), also known as owl parrot (''Strigops habroptilus''), is a species of large, flightless, nocturnal, ground-dwelling parrots of the super-family Strigopoidea, endemic to New Zealan ...

, and the extinct parrots in the genus '' Nelepsittacus'', they form the parrot superfamily

Strigopoidea 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, ...

. The genus ''Nestor'' contains two

parrot

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 ...

from

New Zealand New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island count ...

and two

extinct Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...

species from

Norfolk Island Norfolk Island (, ; Norfuk: ''Norf'k Ailen'') is an external territory of Australia located in the Pacific Ocean between New Zealand and New Caledonia, directly east of Australia's Evans Head and about from Lord Howe Island. Together with ...

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 ...

and

Chatham Island Chatham Island ( ) (Moriori: ''Rēkohu'', 'Misty Sun'; mi, Wharekauri) is by far the largest island of the Chatham Islands group, in the south Pacific Ocean off the eastern coast of New Zealand's South Island. It is said to be "halfway bet ...

, New Zealand, respectively. All species are large stocky birds with short squarish tails. A defining characteristic of the genus is the tongue, which is tipped with a hair-like fringe. The superficial resemblance of this tongue to that of

lorikeet Loriini is a tribe of small to medium-sized arboreal parrots characterized by their specialized brush-tipped tongues for feeding on nectar of various blossoms and soft fruits, preferably berries. The species form a monophyletic group within the ...

s has led some taxonomists to consider the two groups closely related, but DNA evidence shows they are not.

Classification

All four species in the genus ''Nestor'' are thought to stem from a 'proto-kākā', dwelling in the forests of New Zealand 5 million years ago. The closest living relative of the genus is the

(''Strigops habroptilus'').de Kloet, R.S.; de Kloet, S.R. (2005). The evolution of the spindlin gene in birds: sequence analysis of an intron of the spindlin W and Z gene reveals four major divisions of the Psittaciformes. ''Molecular Phylogenetics and Evolution'' 36: 706–721. Together, they form the

, which comprises an ancient group that split off from all other Psittaciformes before their radiation.

Species

There are two

surviving Survival skills are techniques that a person may use in order to sustain life in any type of natural environment or built environment. These techniques are meant to provide basic necessities for human life which include water, food, and shelt ...

species and at least one well documented extinct species in the genus ''Nestor''. Very little is known about the fourth, the Chatham kākā, which may have been conspecific with another kākā species. *

Kea The kea (; ; ''Nestor notabilis'') is a species of large parrot in the family Nestoridae found in the forested and alpine regions of the South Island of New Zealand. About long, it is mostly olive-green with a brilliant orange under its wing ...

, ''Nestor notabilis'' *

Kākā The New Zealand kākā (''Nestor meridionalis'') is a large species of parrot of the family Nestoridae found in New Zealand's native forests. The species is often known by the abbreviated name kākā, although it shares this name with the rece ...

, ''Nestor meridionalis'' ** North Island kākā, ''Nestor meridionalis septentrionalis'' ** South Island kākā, ''Nestor meridionalis meridionalis'' * †

Norfolk kākā The Norfolk kākā (''Nestor productus'') is an extinct species of large parrot, belonging to the parrot family Nestoridae. The birds were about 38 cm long, with mostly olive-brown upperparts, (reddish-)orange cheeks and throat, straw-colou ...

, ''Nestor productus'' (extinct) * †

Chatham kākā The Chatham kākā or Chatham Island kākā (''Nestor chathamensis'') is an extinct parrot species previously found on the Chatham Islands, New Zealand. The first individuals were thought to belong to the New Zealand kākā (''Nestor meridionalis' ...

, ''Nestor chathamensis'' (extinct)

Status

Of the four species, the Norfolk kākā and Chatham kākā became extinct in recent history. The last known individual of the Norfolk kākā died in captivity in London sometime after 1851, and only between seven and 20 skins survive. The Chatham kākā became extinct in pre-European times, after

Polynesians Polynesians form an ethnolinguistic group of closely related people who are native to Polynesia (islands in the Polynesian Triangle), an expansive region of Oceania in the Pacific Ocean. They trace their early prehistoric origins to Island Sou ...

arrived at the island, between 1550 and 1700, and is only known from

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. The mainland

kākā The New Zealand kākā (''Nestor meridionalis'') is a large species of parrot of the family Nestoridae found in New Zealand's native forests. The species is often known by the abbreviated name kākā, although it shares this name with the rece ...

is listed as endangered, and the

kea The kea (; ; ''Nestor notabilis'') is a species of large parrot in the family Nestoridae found in the forested and alpine regions of the South Island of New Zealand. About long, it is mostly olive-green with a brilliant orange under its wing ...

is listed as vulnerable.

References

{{Taxonbar, from=Q508474 Bird genera Parrots of Oceania Taxa named by René Lesson