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The huia ( ; ; ''Heteralocha acutirostris'') is an extinct
species In biology, a species is the basic unit of Taxonomy (biology), 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 ...
of New Zealand wattlebird,
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 els ...
to the
North Island The North Island, also officially named Te Ika-a-Māui, is one of the two main islands of New Zealand, separated from the larger but much less populous South Island by the Cook Strait. The island's area is , making it the world's 14th-larges ...
of New Zealand. The last confirmed sighting of a huia was in 1907, although there was a credible sighting in 1924. It was already a rare bird before the arrival of Europeans, confined to the Ruahine, Tararua, Rimutaka and Kaimanawa mountain ranges in the south-east of the North Island. It was remarkable for having the most pronounced
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 an ...
in bill shape of any bird species in the world. The female's beak was long, thin and arched downward, while the male's was short and stout, like that of a
crow A crow is a bird of the genus ''Corvus'', or more broadly a synonym for all of ''Corvus''. Crows are generally black in colour. The word "crow" is used as part of the common name of many species. The related term " raven" is not pinned scientifica ...
. Males were long, while females were larger at . The sexes were otherwise similar, with orange wattles and deep metallic, bluish-black plumage with a greenish iridescence on the upper surface, especially about the head. The tail feathers were unique among New Zealand birds in having a broad white band across the tips. The birds lived in forests at both
montane Montane ecosystems are found on the slopes of mountains. The alpine climate in these regions strongly affects the ecosystem because temperatures fall as elevation increases, causing the ecosystem to stratify. This stratification is a crucial ...
and lowland elevations – they are thought to have moved seasonally, living at higher elevation in summer and descending to lower elevation in winter. Huia were
omnivorous An omnivore () is an animal that has the ability to eat and survive on both plant and animal matter. Obtaining energy and nutrients from plant and animal matter, omnivores digest carbohydrates, protein, fat, and fiber, and metabolize the nut ...
and ate adult insects, grubs and spiders, as well as the fruits of a small number of
native plants In biogeography, a native species is indigenous to a given region or ecosystem if its presence in that region is the result of only local natural evolution (though often popularised as "with no human intervention") during history. The term is equ ...
. Males and females used their beaks to feed in different ways: the male used his bill to chisel away at rotting wood, while the female's longer, more flexible bill was able to probe deeper areas. Even though the huia is frequently mentioned in biology and
ornithology Ornithology is a branch of zoology that concerns the "methodological study and consequent knowledge of birds with all that relates to them." Several aspects of ornithology differ from related disciplines, due partly to the high visibility and th ...
textbooks because of this striking dimorphism, not much is known about its biology; it was little studied before it was driven to extinction. The huia is one of New Zealand's best-known extinct birds because of its bill shape, its sheer beauty and special place in
Māori culture Māori culture () is the customs, cultural practices, and beliefs of the indigenous Māori people of New Zealand. It originated from, and is still part of, Eastern Polynesian culture. Māori culture forms a distinctive part of New Zealand cul ...
and
oral tradition Oral tradition, or oral lore, is a form of human communication wherein knowledge, art, ideas and cultural material is received, preserved, and transmitted orally from one generation to another. Vansina, Jan: ''Oral Tradition as History'' (1985 ...
. The bird was regarded by Māori as (sacred), and the wearing of its skin or feathers was reserved for people of high status.


Taxonomy and etymology

The genus name, ''Heteralocha'', derives from
Ancient Greek Ancient Greek includes the forms of the Greek language used in ancient Greece and the ancient world from around 1500 BC to 300 BC. It is often roughly divided into the following periods: Mycenaean Greek (), Dark Ages (), the Archaic p ...
''ἕτερος'' "different" and ''ἄλοχος'' "wife". It refers to the striking difference in bill shape between male and female. The
specific name Specific name may refer to: * in Database management systems, a system-assigned name that is unique within a particular database In taxonomy, either of these two meanings, each with its own set of rules: * Specific name (botany), the two-part (bino ...
, ''acutirostris'', derives from
Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power ...
''acutus'', meaning "sharp pointed", and ''rostrum'', meaning "beak", and refers to the beak of the female.
John Gould John Gould (; 14 September 1804 – 3 February 1881) was an English ornithologist. He published a number of monographs on birds, illustrated by plates produced by his wife, Elizabeth Gould, and several other artists, including Edward Lear, ...
described the huia in 1836 as two species: ''Neomorpha acutirostris'' based on a female specimen, and ''N. crassirostris'' based on a male specimen—the epithet ''crassirostris'' derives from the Latin ''crassus'', meaning "thick" or "heavy", and refers to the male's short bill. In 1840,
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 broth ...
proposed the name ''N. gouldii'', arguing that neither of Gould's names was applicable to the species. Gray 1840:15 In 1850,
Jean Cabanis Jean Louis Cabanis (8 March 1816 – 20 February 1906) was a German ornithologist. Cabanis was born in Berlin to an old Huguenot family who had moved from France. Little is known of his early life. He studied at the University of Berlin from 183 ...
replaced the name ''Neomorpha'', which had been previously used for a
cuckoo Cuckoos are birds in the Cuculidae family, the sole taxon in the order Cuculiformes . The cuckoo family includes the common or European cuckoo, roadrunners, koels, malkohas, couas, coucals and anis. The coucals and anis are sometimes separat ...
genus, with ''Heteralocha''. Cabanis 1850–1851:218, footnote In 1888 Sir
Walter Buller Sir Walter Lawry Buller (9 October 1838 – 19 July 1906) was a New Zealand lawyer and naturalist who was a dominant figure in New Zealand ornithology. His book, ''A History of the Birds of New Zealand'', first published in 1873, was publish ...
wrote: "I have deemed it more in accordance with the accepted rules of zoological nomenclature to adopt the first of the two names applied to the species by Mr Gould; and the name ''Neomorpha'' having been previously used in ornithology, it becomes necessary to adopt that of ''Heteralocha'', proposed by Dr Cabanis for this form." Buller 1888:8 The huia appears to be a remnant of an early expansion of passerines in the country of New Zealand, and is the largest of the three members of the family
Callaeidae Callaeidae (sometimes Callaeatidae) is a family of passerine birds endemic to New Zealand. It contains three genera, with five species in the family. One species, the huia, became extinct early in the 20th century, while the South Island kokako ...
, the New Zealand wattlebirds; the others are the saddleback and the kōkako. The only close relative to the family is the stitchbird; their taxonomic relationships to other birds remain to be determined. A molecular study of the nuclear RAG-1 and c-mos genes of the three species within the family proved inconclusive, the data providing most support for either a basally diverging kōkako or huia.


Description

The huia had black plumage with a green metallic tinge and distinctive rounded bright orange
wattle Wattle or wattles may refer to: Plants *''Acacia sensu lato'', polyphyletic genus of plants commonly known as wattle, especially in Australia and South Africa **''Acacia'', large genus of shrubs and trees, native to Australasia **Black wattle, c ...
s at the
gape The beak, bill, or rostrum is an external anatomical structure found mostly in birds, but also in turtles, non-avian dinosaurs and a few mammals. A beak is used for eating, preening, manipulating objects, killing prey, fighting, probing for foo ...
. In both sexes, the eyes were brown; the beak was ivory white, greyish at the base; the legs and feet were long and bluish grey while the claws were light brown. Huia had twelve Best 2005 long glossy black tail feathers, each tipped for with a broad band of white. Barrie and Robertson 2005 Immature huia had small pale wattles, duller plumage flecked with brown, and a reddish-buff tinge to the white tips of the tail feathers. The beak of the young female was only slightly curved. Māori referred to certain huia as ''huia-ariki'', "chiefly huia". The ''huia-ariki'' had brownish plumage streaked with grey, and the feathers on the neck and head were darker. This variant may have been a partial
albino Albinism is the congenital absence of melanin in an animal or plant resulting in white hair, feathers, scales and skin and pink or blue eyes. Individuals with the condition are referred to as albino. Varied use and interpretation of the term ...
, or perhaps such birds were simply of great age. Several true albino huia were recorded. A white specimen painted by
John Gerrard Keulemans Johannes Gerardus Keulemans (J. G. Keulemans) (8 June 1842 – 29 March 1912) was a Dutch bird illustrator. For most of his life he lived and worked in England, illustrating many of the best-known ornithology books of the nineteenth century. Bi ...
around 1900 may have been the result of progressive greying or
leucism Leucism () is a wide variety of conditions that result in the partial loss of pigmentation in an animal—causing white, pale, or patchy coloration of the skin, hair, feathers, scales, or cuticles, but not the eyes. It is occasionally spelled ' ...
, rather than albinism; the current whereabouts of this specimen are unknown. Although sexual dimorphism in bill shape is found in other birds, such as the riflebirds, sicklebills and other wood-excavating birds including some species of
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 region ...
, Jayne-Wilson 2004:76 it was most pronounced in the huia. The beak of the male was short at approximately and slightly arched downwards and robust, very similar to that of the closely related saddleback, while the female's beak was finer, longer at around , and decurved (curved downward) like that of a
hummingbird Hummingbirds are birds native to the Americas and comprise the biological family Trochilidae. With about 361 species and 113 genera, they occur from Alaska to Tierra del Fuego, but the vast majority of the species are found in the tropics ar ...
or
honeyeater The honeyeaters are a large and diverse family, Meliphagidae, of small to medium-sized birds. The family includes the Australian chats, myzomelas, friarbirds, wattlebirds, miners and melidectes. They are most common in Australia and New G ...
. The difference was not only in the bone; the rhamphotheca grew way past the end of the bony maxilla and mandible to produce a pliable implement able to deeply penetrate holes made by wood-boring beetle larvae. The skulls and mandibles of the huia and saddleback are very similar, the latter essentially miniatures of the former. Holdaway, Worthy 2002:481 There are two possible explanations for the evolution of this sexual difference in bill shape. The most widely supported is that it allowed birds of different sexes to utilise different food sources. This divergence may have arisen because of a lack of competitors in these foraging niches in the North Island forest ecosystems. The other idea is that the ivory-coloured bill, which contrasted sharply with the bird's black plumage, may have been used to attract a mate. In animals that use sexually dimorphic physical traits to attract a mate, the dimorphic feature is often brightly coloured or contrasts with the rest of the body, as with the huia. It has been suggested that as the female was the main provider of food for the chicks by regurgitation, this sex evolved the longer bill to obtain the protein-rich invertebrate diet required for the chicks. Another, less obvious aspect of the huia's sexual dimorphism was the minor size difference between the sexes. Males were long, while females were larger at . Additionally, the tail of the male was about in length and the wingspan was between , while the female's tail was and the female's wingspan was .


Distribution and habitat

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 ...
deposits and midden remains reveal that the huia was once widespread in both lowland and montane native forest throughout the
North Island The North Island, also officially named Te Ika-a-Māui, is one of the two main islands of New Zealand, separated from the larger but much less populous South Island by the Cook Strait. The island's area is , making it the world's 14th-larges ...
, extending from the northernmost tip at
Cape Reinga , type =Cape , photo = Cape Reinga, Northland, New Zealand, October 2007.jpg , photo_width = 270px , photo_alt = , photo_caption = , map = New Zealand , map_width = 270px ...
Tennyson and Martinson 2006 to
Wellington Wellington ( mi, Te Whanganui-a-Tara or ) is the capital city of New Zealand. It is located at the south-western tip of the North Island, between Cook Strait and the Remutaka Range. Wellington is the second-largest city in New Zealand by m ...
and the Aorangi Range in the far south. Only a few huia are known from the extensive pitfall deposits in the karst of the Waitomo Caves area and they are also rare or absent in fossil deposits in the central North Island and
Hawke's Bay Hawke's Bay ( mi, Te Matau-a-Māui) is a local government region on the east coast of New Zealand's North Island. The region's name derives from Hawke Bay, which was named by Captain James Cook in honour of Admiral Edward Hawke. The region ...
; it seems to have preferred habitats that are not well sampled by the deposits known at present. The huia vanished from the northern and western North Island following Māori settlement in the 14th century, due to over-hunting, forest clearance, and introduced kiore preying on nests. Holdaway, Worthy 2002:556 By the time of European settlement in the 1840s it was only found south of a line from the Raukumara Range in the east, across the Kaimanawa Range, to the Turakina River in the Rangitikei in the west. In the south, its range extended to the
Wairarapa The Wairarapa (; ), a geographical region of New Zealand, lies in the south-eastern corner of the North Island, east of metropolitan Wellington and south-west of the Hawke's Bay Region. It is lightly populated, having several rural service t ...
and the
Rimutaka Range The Remutaka Range (spelled Rimutaka Range before 2017) is the southernmost range of a mountain chain in the lower North Island of New Zealand. The chain continues north into the Tararua, then Ruahine Ranges, running parallel with the east c ...
east of Wellington. Reports collected by
Walter Buller Sir Walter Lawry Buller (9 October 1838 – 19 July 1906) was a New Zealand lawyer and naturalist who was a dominant figure in New Zealand ornithology. His book, ''A History of the Birds of New Zealand'', first published in 1873, was publish ...
and a single ''waiata'' (Māori song) suggest that the huia was once also found in the Marlborough and Nelson districts of the
South Island The South Island, also officially named , is the larger of the two major islands of New Zealand in surface area, the other being the smaller but more populous North Island. It is bordered to the north by Cook Strait, to the west by the Tasma ...
; however, it has never been identified in the rich fossil deposits south of Cook Strait, Holdaway, Worthy 2002:437 and there is no other evidence of the species' presence. Higgins et al. 2006:1014 The huia inhabited both of the two principal forest types in New Zealand. They were primarily found in broadleaf-podocarp forests where there was a dense understorey, but occasionally also in southern beech (''
Nothofagus ''Nothofagus'', also known as the southern beeches, is a genus of 43 species of trees and shrubs native to the Southern Hemisphere in southern South America (Chile, Argentina) and Australasia (east and southeast Australia, New Zealand, New Gu ...
'') forest. The species was observed in native vegetation including mataī ('' Prumnopitys taxifolia''), rimu (''
Dacrydium cupressinum ''Dacrydium cupressinum'', commonly known as rimu, is a large evergreen coniferous tree endemic to the forests of New Zealand. It is a member of the southern conifer group, the podocarps. The Māori name ''rimu'' comes from the Polynesian ...
''), kahikatea ('' Dacrycarpus dacrydioides''), northern rātā ('' Metrosideros robusta''), maire ('' Nestegis''), hinau ('' Elaeocarpus dentatus''), totara (''
Podocarpus totara ''Podocarpus totara'' (; from the Maori-language ; the spelling "totara" is also common in English) is a species of podocarp tree endemic to New Zealand. It grows throughout the North Island and northeastern South Island in lowland, montane and ...
''), rewarewa (''
Knightia excelsa ''Knightia excelsa'', commonly called rewarewa (from Māori), is an evergreen tree endemic to the low elevation and valley forests of New Zealand's North Island and Marlborough Sounds (41° S) and the type species for the genus '' Knightia''. ...
''), mahoe ('' Melicytus ramiflorus''), and taraire ('' Beilschmiedia tarairi''), and at sea level in karaka ('' Corynocarpus laevigatus'') trees at Cape Turakirae. It was never seen in burnt forest or land cleared for farming.


Ecology and behaviour


Movements

The huia's movements are little known, but it was most likely sedentary. The huia is thought to have undertaken seasonal movements, living in montane forests in the summer and moving down into lowland forests in the winter to avoid the harsher weather and cold temperatures of higher altitudes. Like the surviving New Zealand wattlebirds, the saddleback and the kōkako, the huia was a weak flier and could only fly for short distances, and seldom above tree height. More often it would use its powerful legs to propel it in long leaps and bounds through the
canopy Canopy may refer to: Plants * Canopy (biology), aboveground portion of plant community or crop (including forests) * Canopy (grape), aboveground portion of grapes Religion and ceremonies * Baldachin or canopy of state, typically placed over an ...
or across the forest floor, or it would cling vertically to tree trunks with its tail spread for balance.


Feeding and ecology

The huia, with the previously endangered saddleback, were the two species of classic bark and wood probers in the arboreal insectivore
guild A guild ( ) is an association of artisans and merchants who oversee the practice of their craft/trade in a particular area. The earliest types of guild formed as organizations of tradesmen belonging to a professional association. They sometimes ...
in the New Zealand avifauna. Woodpeckers do not occur east of Wallace's line; their
ecological niche In ecology, a niche is the match of a species to a specific environmental condition. Three variants of ecological niche are described by It describes how an organism or population responds to the distribution of resources and competitors (fo ...
is filled by other groups of birds that feed on wood-boring beetle larvae, albeit in rotting wood. The woodpecker-like role was taken on by two species in two different families in the New Zealand mixed-podocarp and ''Nothofagus'' forests; one was the huia and the other was the kaka. Holdaway, Worthy 2002:483 The huia foraged mainly on decaying wood. Although it was considered a specialist predator of the
larva A larva (; plural larvae ) is a distinct juvenile form many animals undergo before metamorphosis into adults. Animals with indirect development such as insects, amphibians, or cnidarians typically have a larval phase of their life cycle. Th ...
e of the
nocturnal Nocturnality is an ethology, animal behavior characterized by being active during the night and sleeping during the day. The common adjective is "nocturnal", versus diurnality, diurnal meaning the opposite. Nocturnal creatures generally have ...
huhu beetle (''
Prionoplus reticularis The huhu beetle (''Prionoplus reticularis'') is a longhorn beetle endemic to New Zealand. It is the heaviest beetle found in New Zealand. Māori name To Māori, the larval form is known as huhu (also tunga haere, tunga rākau) with the adult ...
''), it also ate other insects—including wētā—insect larvae, spiders, and fruit. Higgins et al. 2006:1015 Insects and spiders were taken from decaying wood, from under bark, mosses and lichens, and from the ground. Huia foraged either alone, in pairs, or in small flocks of up to five, which were probably family groups. Higgins et al. 2006:1016 The sexual dimorphism of the bill structure gave rise to feeding strategies that differed radically between the sexes. The male used its
adze An adze (; alternative spelling: adz) is an ancient and versatile cutting tool similar to an axe but with the cutting edge perpendicular to the handle rather than parallel. Adzes have been used since the Stone Age. They are used for smoothing ...
-like bill to chisel and rip into the outer layers of decaying wood, while the female probed areas inaccessible to the male, such as the burrows of insect larvae in living wood. The male had well-developed cranial musculature allowing rotten wood to be chiselled and pried apart by "gaping" motions. There are corresponding differences in the structure and musculature of the head and neck between males and females. Huia had very well developed depressor jaw muscles, and an occipital crest that provided extra surface for muscle attachment, allowing the jaw to be opened with considerable force. Once the bird had secured a meal, it flew to a perch with the insect in its feet. The huia stripped its meal of any hard parts, then tossed the remainder up, caught, and swallowed it. Pairs did not cooperate in feeding, at least not in a strict sense. All such reports are based on misunderstanding of an account by ornithologist
Walter Buller Sir Walter Lawry Buller (9 October 1838 – 19 July 1906) was a New Zealand lawyer and naturalist who was a dominant figure in New Zealand ornithology. His book, ''A History of the Birds of New Zealand'', first published in 1873, was publish ...
Buller 1888 of a pair kept in captivity obtaining wood-boring beetle larvae. According to this misunderstanding, which has become part of ecological folklore, the male would tear at the wood and open larval tunnels, thus allowing the female to probe deeply into the tunnels with her long, pliant bill. Rather, the divergent bills represent an extreme example of niche differentiation, reducing
intraspecific competition Intraspecific competition is an interaction in population ecology, whereby members of the same species compete for limited resources. This leads to a reduction in fitness for both individuals, but the more fit individual survives and is able to r ...
between the sexes. This allowed the species to exploit a wide range of food sources in different microhabitats. Holdaway, Worthy 2002:482 The New Zealand forest relies heavily on
frugivorous A frugivore is an animal that thrives mostly on raw fruits or succulent fruit-like produce of plants such as roots, shoots, nuts and seeds. Approximately 20% of mammalian herbivores eat fruit. Frugivores are highly dependent on the abundance an ...
birds for seed dispersal: about 70% of the woody plants have fruits that are probably dispersed by birds, which included the huia. The range of fruits eaten by the huia is difficult to establish: hinau ('' Elaeocarpus dentatus''), pigeonwood (''
Hedycarya arborea ''Hedycarya arborea'', commonly known as pigeonwood, porokaiwhiri, and poporokaiwhiri is an endemic tree of New Zealand. Found on both the North and South South is one of the cardinal directions or Points of the compass, compass points. The d ...
'') and various species of ''
Coprosma ''Coprosma'' is a genus of flowering plants in the family Rubiaceae. It is found in New Zealand, Hawaiian Islands, Borneo, Java, New Guinea, islands of the Pacific Ocean to Australia and the Juan Fernández Islands. Description The name ''Copros ...
'' are recorded by Buller, and they were also recorded as eating the fruits of kahikatea ('' Dacrycarpus dacrydioides''). The extinction of the huia and other frugivorous New Zealand bird species including the moa and piopio, and the diminishing range of many others, including the kiwi,
weka The weka, also known as the Māori hen or woodhen (''Gallirallus australis'') is a flightless bird species of the rail family. It is endemic to New Zealand. It is the only extant member of the genus '' Gallirallus''. Four subspecies are recog ...
, and kōkako, has left few effective seed dispersers in the New Zealand forest. For plants with fruit greater than 1 cm in diameter, kereru are the sole remaining dispersers in the ecosystem, and they are rare or extinct in some areas. This depletion of avifauna in the forest ecosystem may be having major impacts on processes such as forest regeneration and seed dispersal.


Voice

Like so many other aspects of its biology, the vocalisations of the huia are not well known, and present knowledge is based on very few accounts. The calls were mostly a varied array of whistles, "peculiar and strange", but also "soft, melodious and flute-like". An imitation of the bird's call survives as a recording of 1909 huia search team member Henare Hamana whistling the call (see ''External links''). Huia were often silent. When they did vocalise, their calls could carry considerable distances – some were audible from up to away through dense forest. The calls were said to differ between sexes, though there are no details. Calls were given with the bird's head and neck stretched outward and its bill pointing 30 to 45 degrees from the vertical. Most references describe huia calls as heard in the early morning; one records it as the first bird to sing in the dawn chorus, and captive birds were known to "wake the household". Like the whitehead, huia behaved unusually before the onset of wet weather, being "happy and in full song". The bird's name is
onomatopoeic Onomatopoeia is the process of creating a word that phonetically imitates, resembles, or suggests the sound that it describes. Such a word itself is also called an onomatopoeia. Common onomatopoeias include animal noises such as ''oink'', '' ...
: it was named by Māori for its loud distress call, a smooth, unslurred whistle rendered as ''uia, uia, uia'' or ''where are you?''. This call was said to be given when the bird was excited or hungry. Chicks had a "plaintive cry, pleasant to the ear", would feebly answer imitations by people, and were very noisy when kept in tents.


Commensals and parasites

A species of parasitic phtilopterid
louse Louse ( : lice) is the common name for any member of the clade Phthiraptera, which contains nearly 5,000 species of wingless parasitic insects. Phthiraptera has variously been recognized as an order, infraorder, or a parvorder, as a result ...
, '' Rallicola extinctus'', was only known to live on the huia, and apparently became extinct with its host. In 2008, a new species of feather mite, ''Coraciacarus muellermotzfeldi'', was described from dried corpses found in the feathers of a huia skin held by a European museum. While the genus ''Coraciacarus'' has a wide range of hosts globally, the presence of a representative of the genus on a
passerine A passerine () is any bird of the order Passeriformes (; from Latin 'sparrow' and '-shaped'), which includes more than half of all bird species. Sometimes known as perching birds, passerines are distinguished from other orders of birds by th ...
bird was an "enigmatic phenomenon". The discoverers suggested the mite could have been horizontally transferred from one of the two native, migratory species of
cuckoo Cuckoos are birds in the Cuculidae family, the sole taxon in the order Cuculiformes . The cuckoo family includes the common or European cuckoo, roadrunners, koels, malkohas, couas, coucals and anis. The coucals and anis are sometimes separat ...
(Cuculiformes).


Social behaviour and reproduction

A quiet, social bird, the huia was
monogamous Monogamy ( ) is a form of dyadic relationship in which an individual has only one partner during their lifetime. Alternately, only one partner at any one time ( serial monogamy) — as compared to the various forms of non-monogamy (e.g., polyg ...
, and pairs probably paired for life. The bird was usually found in breeding pairs, although sometimes groups of four or more were encountered.
Walter Buller Sir Walter Lawry Buller (9 October 1838 – 19 July 1906) was a New Zealand lawyer and naturalist who was a dominant figure in New Zealand ornithology. His book, ''A History of the Birds of New Zealand'', first published in 1873, was publish ...
records that a tame pair would always keep close to each other, constantly uttering a "low affectionate twitter", even when in captivity. There are records of this same pair and a further, wild pair "hopping from branch to branch and fanning their tails, then meeting to caress each other with their bills" and uttering these noises. The male is said to have fed the female in courtship. It is thought that these behaviours may have been a sexual display. The claim that the male fed the female while she was incubating and on the nest "lacks evidence". When the male of this captive pair was accidentally killed, the female "manifesting the utmost distress pined for her mate and died 10 days afterwards". A Māori man in the 19th century recalled: "I was always told by my old people that a pair of huia lived on most affectionate terms ... If the male died first, the female died soon after of grief". The huia had no fear of people; females allowed themselves to be handled on the nest, and birds could easily be captured by hand. Little is known about the huia's reproduction, as only two eggs and four nests were ever described. The only known huia egg to still exist is in the collection of the
Museum of New Zealand Te Papa Tongarewa The Museum of New Zealand Te Papa Tongarewa is New Zealand's national museum and is located in Wellington. ''Te Papa Tongarewa'' translates literally to "container of treasures" or in full "container of treasured things and people that spring fr ...
. The breeding season for mating, building nests, laying eggs and raising young is thought to have been late spring (October–November). It is thought they nested solitarily; pairs are said to have been
territorial A territory is an area of land, sea, or space, particularly belonging or connected to a country, person, or animal. In international politics, a territory is usually either the total area from which a state may extract power resources or an ...
and the birds would remain on their territories for life. Huia appear to have raised just one brood per season; the number of eggs in a clutch is variously described as being 3–5, 4, 2–4 and 1–4. These eggs were greyish with purple and brown speckles, and measured . Incubation was mostly by the female, though there is evidence that the male also had a small role, as rubbed-bare brooding patches that were smaller than those of females were discovered on some males in November. The incubation period is unknown. Eggshells were apparently removed from the nest by adults. The brood size was usually one or two, though there was the odd record of up to three chicks in a single nest. Nests were constructed in varying places: in dead trees, the crooks of large branches, tree hollows, on branches, or "on or near the ground", and some nests were covered with hanging vegetation or vines. The nest itself was a large saucer-shaped structure, up to 350 mm in diameter and 70 mm deep, with thick walls of dry grass, leaves and "withered stems of herbaceous plants". A central small, shallow cup of soft materials such as grass and fine twigs cushioned and insulated the eggs. After hatching, young remained in the family group and were fed by the adults for three months, by which time they appeared adult.


Relationship with humans


In culture

In Māori culture, the "white heron and the Huia were not normally eaten but were rare birds treasured for their precious plumes, worn by people of high rank". Orbell 1992:82–83Orbell mentions some of the sacred associations of the huia, saying that if a man dreamed of a huia or its feathers, it meant his wife would conceive a daughter (page 83). The bold and inquisitive nature of the huia made it particularly easy to capture. Māori attracted the huia by imitating its call and then captured it with a ''tari'' (a carved pole with a noose at the end) or snare, or killed it with clubs or long spears. Often they exploited the strong pair bond by capturing one of a pair, which would then call out, attracting its mate, which could be easily captured. Opinion on the quality of huia meat as food varied wildly; although not usually hunted for this purpose, the huia was considered "good eating" in pies or curried stew by some, but a "tough morsel" and "unfit to eat" by others. Although the huia's range was restricted to the southern North Island, its tail feathers were valued highly and were exchanged among tribes for other valuable goods such as
pounamu Pounamu is a term for several types of hard and durable stone found in southern New Zealand. They are highly valued in New Zealand, and carvings made from pounamu play an important role in Māori culture. Name The Māori word , also use ...
and shark teeth, or given as tokens of friendship and respect. Through this trade, the feathers reached the far north and the far south of New Zealand. They were stored in intricately carved boxes called '' waka huia'', which were hung from the ceilings of chiefs' houses. Huia feathers were worn at funerals and used to decorate the heads of the deceased. The ''marereko'', described by
Edward Robert Tregear Edward Robert Tregear , Ordre des Palmes académiques (1846–1931) was a New Zealand public servant and scholar. He was an architect of New Zealand's advanced social reforms and progressive labour legislation during the 1890s. Biography He was ...
as an "ancient war-plume", consisted of twelve huia feathers. The highly valued ''pōhoi'' was an ornament made from the skin of the huia: the bird was skinned with the beak, skull and wattles attached and the legs and wings removed, carefully dried, and the resulting ornament worn from the neck or ears. Dried huia heads were also worn as pendants called ''ngutu huia''. A captured huia would be kept in a small cage so that its tail feathers could be plucked as they grew to full size. The bird was also kept by Māori as a pet, and like the tūī, it could be trained to say a few words. There is also a record of a tame huia kept by European settlers in a small village in the Forty-Mile Bush in the 19th century. New Zealand has released several postage stamps portraying the huia. The New Zealand sixpence coin, minted between 1933 and 1966, featured a female huia on the reverse. The degree to which the huia was known and admired in New Zealand is reflected in the large number of suburban and geographical features which are named after the species. There are several roads and streets named after the huia in the North Island, with several in Wellington (including Huia Road in
Days Bay Days Bay is a residential area in Lower Hutt in the Wellington Region of the North Island of New Zealand. It is walled on three sides by steep bush-clad slopes. Most of its level land is occupied by Williams Park and an independent boys' prima ...
– not far from where one of the last sightings of this species occurred in the early 1920s in the forests of East Harbour Regional Park) and also in Auckland, where there is even a Huia township in West Auckland (although the township is named after a
Waikato Tainui Waikato Tainui, Waikato or Tainui is a group of Māori ''iwi'' based in Waikato Region, in the western central region of New Zealand's North Island. It is part of the larger Tainui confederation of Polynesian settlers who arrived to New Zealan ...
chief of the same name). A
river A river is a natural flowing watercourse, usually freshwater Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the ...
on the west coast of the South Island and the Huiarau Ranges in the central North Island are also named after the bird. The species was once found living in great abundance in the forests of these mountains: ''Huiarau'' means "a hundred huia". Businesses include the public swimming pool in
Lower Hutt Lower Hutt ( mi, Te Awa Kairangi ki Tai) is a city in the Wellington Region of New Zealand. Administered by the Hutt City Council, it is one of the four cities that constitute the Wellington metropolitan area. It is New Zealand's sixth most ...
, a Marlborough winery, and Huia Publishers, which specialises in Māori writing and perspectives. The name was first given to a child in the late 19th century, to the son of members of a lower North Island ''
iwi Iwi () are the largest social units in New Zealand Māori culture, Māori society. In Māori-language, Māori roughly means "people" or "nation", and is often translated as "tribe", or "a confederation of tribes". The word is both singular and ...
'' concerned about the bird's rapid decline, and although uncommon, it is still used today in New Zealand as a name for girls and more rarely for boys (e.g. Huia Edmonds), of both European and Māori descent. Huia also featured extensively in contemporary art and handcrafts, commonly seen in gift shops the around the country. In 2020 Prime Minister
Jacinda Ardern Jacinda Kate Laurell Ardern ( ; born 26 July 1980) is a New Zealand politician who has been serving as the 40th prime minister of New Zealand and Leader of the New Zealand Labour Party, leader of the Labour Party since 2017. A member of the L ...
wore upcycled Huia feather earrings during a public
COVID-19 Coronavirus disease 2019 (COVID-19) is a contagious disease caused by a virus, the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The first known case was identified in Wuhan, China, in December 2019. The disease quickl ...
announcement causing demand to soar. Tail feathers of the extinct huia are very rare and they have become a collectors' item. In June 2010 a single huia tail feather sold at auction in Auckland for NZ$8,000, much higher than the $500 the auctioneers had expected, making it the most expensive feather ever. The previous record price for a single feather was $US2,800 (NZ$4,000) achieved by a
bald eagle The bald eagle (''Haliaeetus leucocephalus'') is a bird of prey found in North America. A sea eagle, it has two known subspecies and forms a species pair with the white-tailed eagle (''Haliaeetus albicilla''), which occupies the same nich ...
feather at auction in the United States. In the 2016 New Zealand film '' Hunt for the Wilderpeople'' two of the characters encounter a huia, and eventually set out to obtain proof of their sighting. Reviewers asserted that in the film the huia is significant as a "uniquely indigenous" symbol that "represents harmony with nature and the wild."


Extinction

The huia was found throughout the North Island before humans arrived in New Zealand. Māori are estimated to have arrived around 750 years ago, and by the arrival of European settlers in the 1840s, habitat destruction, hunting, and introduced rats had reduced the bird's range to the southern North Island. However, Māori hunting pressures on the huia were limited to some extent by traditional protocols. The hunting season was from May to July when the bird's plumage was in prime condition, while a ''
rāhui __NOTOC__ In Māori culture, a rāhui is a form of tapu restricting access to, or use of, an area or resource by the '' kaitiakitanga'' of the area. With the passing of the 1996 Fisheries Act, a rāhui was able to be imposed by the New Zealand Mi ...
'' (hunting ban) was enforced in spring and summer. After European settlement the huia's numbers began to decline more quickly, due mainly to two well-documented factors: widespread deforestation and over-hunting. Like the extinctions of other New Zealand birds such as the piopio in the 19th century, the decline of the huia was poorly studied. Massive deforestation occurred in the North Island at this time, particularly in the lowlands of southern
Hawkes Bay Hawke's Bay ( mi, Te Matau-a-Māui) is a local government region on the east coast of New Zealand's North Island. The region's name derives from Hawke Bay, which was named by Captain James Cook in honour of Admiral Edward Hawke. The region i ...
, the Manawatu and the
Wairarapa The Wairarapa (; ), a geographical region of New Zealand, lies in the south-eastern corner of the North Island, east of metropolitan Wellington and south-west of the Hawke's Bay Region. It is lightly populated, having several rural service t ...
, as land was cleared by European settlers for agriculture. The huia was particularly vulnerable to this as it could only live in
old-growth forest An old-growth forestalso termed primary forest, virgin forest, late seral forest, primeval forest, or first-growth forestis a forest that has attained great age without significant disturbance, and thereby exhibits unique ecological featur ...
where there were abundant rotting trees filled with wood-boring insect larvae. It seems it could not survive in regenerating,
secondary forest A secondary forest (or second-growth forest) is a forest or woodland area which has re-grown after a timber harvest or clearing for agriculture, until a long enough period has passed so that the effects of the disturbance are no longer evident. ...
s. Although the mountainous part of its former range was not deforested, the lowland forests of the valleys below were systematically destroyed. The destruction of this part of its habitat would have undoubtedly had a severe impact on huia populations, but its removal would have been particularly dire if they did in fact descend to the lowlands as a winter refuge to escape snow at higher altitudes as some researchers including Oliver have surmised. It appears that predation by invasive mammalian species including
ship rat The black rat (''Rattus rattus''), also known as the roof rat, ship rat, or house rat, is a common long-tailed rodent of the stereotypical rat genus ''Rattus'', in the subfamily Murinae. It likely originated in the Indian subcontinent, but is n ...
s, cats, and
mustelid The Mustelidae (; from Latin ''mustela'', weasel) are a family of carnivorous mammals, including weasels, badgers, otters, ferrets, martens, minks and wolverines, among others. Mustelids () are a diverse group and form the largest family in t ...
s was an additional factor in the decline in huia numbers – introduction of these animals by New Zealand
acclimatisation societies Acclimatisation societies were voluntary associations in the 19th and 20th centuries that encouraged the introduction of non-native species in various places around the world, in the hope that they would acclimatise and adapt to their new environm ...
peaked in the 1880s and coincided with a particularly sharp decline in huia populations. Because it spent a lot of time on the ground, the huia would have been particularly vulnerable to mammalian predators. Another hypothetical cause of extinction is exotic parasites and disease introduced from Asia with the common myna. Habitat destruction and the predations of introduced species were problems faced by all New Zealand birds, but in addition the huia faced massive pressure from hunting. Due to its pronounced sexual dimorphism and its beauty, huia were sought after as mounted specimens by wealthy collectors in Europe Jayne-Wilson 2004:140 and by museums all over the world. These individuals and institutions were willing to pay large sums of money for good specimens, and the overseas demand created a strong financial incentive for hunters in New Zealand. This hunting was initially by naturalists. Austrian taxidermist Andreas Reischek took 212 pairs as specimens for the natural history museum in
Vienna en, Viennese , iso_code = AT-9 , registration_plate = W , postal_code_type = Postal code , postal_code = , timezone = CET , utc_offset = +1 , timezone_DST ...
over a period of 10 years, while New Zealand ornithologist
Walter Buller Sir Walter Lawry Buller (9 October 1838 – 19 July 1906) was a New Zealand lawyer and naturalist who was a dominant figure in New Zealand ornithology. His book, ''A History of the Birds of New Zealand'', first published in 1873, was publish ...
collected 18 on just one of several expeditions to the
Rimutaka Range The Remutaka Range (spelled Rimutaka Range before 2017) is the southernmost range of a mountain chain in the lower North Island of New Zealand. The chain continues north into the Tararua, then Ruahine Ranges, running parallel with the east c ...
s in 1883. Others keen to profit soon joined in. Buller records that also in 1883, a party of 11 Māori obtained 646 huia skins from the forest between the Manawatu Gorge and Ākitio. Several thousand huia were exported overseas as part of this trade. Infrastructure development within lowland forest did not help the situation: hundreds of huia were shot around road and rail construction camps. The rampant and unsustainable hunting was not just financially motivated: it also had a more philosophical, fatalistic aspect. The conventional wisdom among New Zealand Europeans in the 19th century was that things colonial, whether they were plants, animals or people, were inferior to things European. Jayne-Wilson 2004:265 It was widely assumed that the plants and animals of New Zealand's forest ecosystems would be quickly replaced by more vigorous and competitive European species. This assumption of inevitable doom led to a conclusion that the conservation of native biota was pointless and futile; Victorian collectors instead focused their efforts on acquiring a good range of specimens before the rare species disappeared altogether. There were some attempts to conserve the huia, but they were few, poorly organised and poorly enforced legally: the
conservation movement The conservation movement, also known as nature conservation, is a political, environmental, and social movement that seeks to manage and protect natural resources, including animal, fungus, and plant species as well as their habitat for the f ...
in New Zealand was still very much in its infancy. There were successive sharp declines in numbers of huia in the 1860s and in the late 1880s, prompting the chiefs of the Manawatu and the Wairarapa to place a
rāhui __NOTOC__ In Māori culture, a rāhui is a form of tapu restricting access to, or use of, an area or resource by the '' kaitiakitanga'' of the area. With the passing of the 1996 Fisheries Act, a rāhui was able to be imposed by the New Zealand Mi ...
on the Tararua Range. In February 1892, the Wild Birds Protection Act was amended to include the huia, making it illegal to kill the bird, but enforcement was not taken seriously. Island sanctuaries were set up for endangered native birds after this act, but the new bird sanctuaries, including
Kapiti Island Kapiti Island () is an island about off the west coast of the lower North Island of New Zealand. It is long, running southwest/northeast, and roughly wide, being more or less rectangular in shape, and has an area of . Its name has been used s ...
, Little Barrier Island and Resolution Island, were never stocked with huia. Although attempts were made to capture birds for transfer, no huia were ever transferred. The Kapiti Island attempt is documented as being particularly poorly managed. A live pair destined to be transferred to the island in 1893 was instead appropriated by Buller, who bent the law to take them back to England as a present for Lord Rothschild, along with the last collected live pair of laughing owls. The
Duke Duke is a male title either of a monarch ruling over a duchy, or of a member of Royal family, royalty, or nobility. As rulers, dukes are ranked below emperors, kings, grand princes, grand dukes, and sovereign princes. As royalty or nobility, t ...
and
Duchess of York Duchess of York is the principal courtesy title held by the wife of the duke of York. Three of the eleven dukes of York either did not marry or had already assumed the throne prior to marriage, whilst two of the dukes married twice, therefore the ...
(later
George V George V (George Frederick Ernest Albert; 3 June 1865 – 20 January 1936) was King of the United Kingdom and the British Dominions, and Emperor of India, from 6 May 1910 until his death in 1936. Born during the reign of his grandmother Q ...
and Queen Mary) visited New Zealand in 1901. At an official Māori welcome in
Rotorua Rotorua () is a city in the Bay of Plenty region of New Zealand's North Island. The city lies on the southern shores of Lake Rotorua, from which it takes its name. It is the seat of the Rotorua Lakes District, a territorial authority encompa ...
, a guide took a huia tail feather from her hair and placed it in the band of the Duke's hat as a token of respect. Many people in England and New Zealand wanted to emulate this royal fashion and wear huia feathers in their hats. The price of tail feathers was soon pushed to £1, making each bird worth £12, and some feathers sold for as much as £5. Female huia beaks were also set in gold as jewellery. Shooting season notices ceased listing the huia as a protected species in 1901, and a last-ditch attempt to reinforce government protection failed when the solicitor general ruled that there was no law to protect feathers. The decline of the huia over the southern half of the North Island occurred at markedly different rates in different locations. Areas where dramatic declines were observed in the 1880s included the Puketoi Range, the
Hutt Valley The Hutt Valley (or 'The Hutt') is the large area of fairly flat land in the Hutt River, New Zealand, Hutt River valley in the Wellington Region, Wellington region of New Zealand. Like the river that flows through it, it takes its name from Sir ...
and Tararuas, and the
Pahiatua , image_skyline = Market day pahiatua 1st dec 2007 1.JPG , imagesize = , image_caption = , image_flag = , flag_size = , image_seal = , seal_size = , image_shi ...
-
Dannevirke Dannevirke ( " work of the Danes", a reference to Danevirke; mi, Taniwaka, lit= or ''Tāmaki-nui-a-Rua'', the area where the town is), is a rural service town in the Manawatū-Whanganui region of the North Island, New Zealand. It is the ma ...
area. The species was abundant in a few places in the early 20th century between Hawke's Bay and the Wairarapa; a flock of 100–150 birds was reported at the summit of the Akatarawa–Waikanae track in 1905; they were still "fairly plentiful" in the upper reaches of the Rangitikei River in 1906 – and yet, the last confirmed sighting came just one year later. The last official, confirmed huia sighting was made on 28 December 1907 when W. W. Smith saw three birds in the forests of the Tararua Ranges. Unconfirmed, "quite credible" reports suggest that extinction for the species came a little later. A man familiar with the species reported seeing three huia in Gollans Valley behind York Bay (between
Petone Petone (Māori: ''Pito-one''), a large suburb of Lower Hutt, Wellington, stands at the southern end of the Hutt Valley, on the northern shore of Wellington Harbour. The Māori name means "end of the sand beach". Europeans first settled in P ...
and
Eastbourne Eastbourne () is a town and seaside resort in East Sussex, on the south coast of England, east of Brighton and south of London. Eastbourne is immediately east of Beachy Head, the highest chalk sea cliff in Great Britain and part of the l ...
on Wellington Harbour), an area of mixed beech and podocarp forest well within the bird's former range, on 28 December 1922. Morris and Smith 1995 Sightings of the huia were also reported there in 1912 and 1913. Despite this, naturalists from the Dominion Museum in Wellington did not investigate the reports. The last credible reports of huia come from the forests of
Te Urewera National Park Te Urewera National Park was a national park near the east coast of New Zealand's North Island, established as such in 1954 and disestablished in 2014, when it was replaced by a new legal entity and protected area named ''Te Urewera''. The p ...
, with one from near Mt Urutawa in 1952 and final sightings near Lake Waikareiti in 1961 and 1963. The possibility of a small huia population still surviving in the Urewera ranges has been proposed by some researchers, but is considered highly unlikely. No recent expeditions have been mounted to find a living specimen. Students at
Hastings Boys' High School Hastings Boys' High School is a boys' secondary school in Hastings, New Zealand. The school is part of the Super 8. The school was founded in 1904 as Hastings High School. In 1922, it became Hastings Technical School under the leadership of Will ...
organised a conference in 1999 to consider
cloning Cloning is the process of producing individual organisms with identical or virtually identical DNA, either by natural or artificial means. In nature, some organisms produce clones through asexual reproduction. In the field of biotechnology, c ...
the huia, their school emblem. The tribe
Ngāti Huia Ngāti Huia is a ''hapū'' (subtribe) of the Ngāti Raukawa ''iwi'' (Māori tribe) of New Zealand. The leading chief of Ngāti Huia and Ngāti Raukawa in the 1820s to 1840s was Te Whatanui, who led part of Ngāti Raukawa from their traditional lan ...
agreed in principle to support the endeavour, which would be carried out at the
University of Otago , image_name = University of Otago Registry Building2.jpg , image_size = , caption = University clock tower , motto = la, Sapere aude , mottoeng = Dare to be wise , established = 1869; 152 years ago , type = Public research collegiate u ...
, and a California-based Internet start-up volunteered $100,000 of funding. However, Sandy Bartle, curator of birds at the
Museum of New Zealand Te Papa Tongarewa The Museum of New Zealand Te Papa Tongarewa is New Zealand's national museum and is located in Wellington. ''Te Papa Tongarewa'' translates literally to "container of treasures" or in full "container of treasured things and people that spring fr ...
, said that the complete huia
genome In the fields of molecular biology and genetics, a genome is all the genetic information of an organism. It consists of nucleotide sequences of DNA (or RNA in RNA viruses). The nuclear genome includes protein-coding genes and non-coding ...
could not be derived from museum skins because of the poor state of the DNA, and cloning was therefore unlikely to succeed.


References


Bibliography

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Further reading

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External links


Huia specimens
at the Museum of New Zealand Te Papa Tongarewa
Huia calls (imitation)
{{authority control Callaeidae Birds of the North Island Extinct birds of New Zealand Māori culture Species made extinct by human activities Birds described in 1837 Bird extinctions since 1500 Articles containing video clips