Kōkako (''Callaeas'') are two species of endangered forest

bird 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 lightweig ...

s which are

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 else ...

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 coun ...

, the

North Island kōkako The North Island kōkako (''Callaeas wilsoni'') is an endangered forest bird which is endemic to the North Island of New Zealand. It is grey in colour, with a small black mask. It has blue wattles (although this colour develops with age: in the ...

(''Callaeas wilsoni'') and the presumably extinct South Island kōkako (''Callaeas cinereus''). They are both slate-grey with wattles and have black masks. They belong to a genus containing five known species of New Zealand wattlebird, the other three being two species of tieke (saddleback) and the extinct

huia The huia ( ; ; ''Heteralocha acutirostris'') is an extinct species of New Zealand wattlebird, endemic to the North Island of New Zealand. The last confirmed sighting of a huia was in 1907, although there was a credible sighting in 1924. It ...

. Previously widespread, kōkako populations throughout New Zealand have been decimated by the predations of mammalian invasive species such as

possums Possum may refer to: Animals * Phalangeriformes, or possums, any of a number of arboreal marsupial species native to Australia, New Guinea, and Sulawesi ** Common brushtail possum (''Trichosurus vulpecula''), a common possum in Australian urban ...

stoat The stoat (''Mustela erminea''), also known as the Eurasian ermine, Beringian ermine and ermine, is a mustelid native to Eurasia and the northern portions of North America. Because of its wide circumpolar distribution, it is listed as Least Conc ...

s, cats and rats, and their range has contracted significantly. In the past this bird was called the New Zealand crow; however, it is not a crow at all, but it looks like one from a distance. The spelling ''kokako'' (without a macron) is common in

New Zealand English New is an adjective referring to something recently made, discovered, or created. New or NEW may refer to: Music * New, singer of K-pop group The Boyz Albums and EPs * ''New'' (album), by Paul McCartney, 2013 * ''New'' (EP), by Regurgitator ...

Taxonomy

The kōkako appears to be a remnant of an early expansion of passerines in New Zealand and is one of five species of New Zealand wattlebirds 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 kokak ...

, the others being two species of

endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and in ...

tieke, or saddleback, and the extinct

. New Zealand wattlebirds have no close relatives apart from the

stitchbird The stitchbird or hihi (''Notiomystis cincta'') is a honeyeater-like bird endemic to the North Island and adjacent offshore islands of New Zealand. Its evolutionary relationships have long puzzled ornithologists, but it is now classed as the o ...

, and their taxonomic relationships to other birds remain to be determined.

Description

The

, ''Callaeas wilsoni'' has blue wattles (although this colour develops with age: in the young of this bird they are actually coloured a light pink). The South Island kōkako, ''Callaeas cinereus'', by contrast has largely orange wattles, with only a small patch of blue at the base.

Behaviour

The kōkako has a beautiful, clear, organ-like song. Its call can carry for kilometres. Breeding pairs sing together in a bell-like duet for up to an hour in the early morning. Different populations in different parts of the North Island (if any populations of the South Island kōkako remain they are at present unknown) have distinctly different songs. The kōkako is a poor flier and seldom flies more than 100 metres. The wings of this species are relatively short and rounded. It prefers to hop and leap from branch to branch on its powerful grey legs. It does not fly so much as glide and when seen exhibiting this behaviour they will generally scramble up tall trees (frequently New Zealand

podocarps Podocarpaceae is a large family of mainly Southern Hemisphere conifers, known in English as podocarps, comprising about 156 species of evergreen trees and shrubs.James E. Eckenwalder. 2009. ''Conifers of the World''. Portland, Oregon: Timber P ...

such as

rimu ''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 ...

and matai) before gliding to others nearby. Its ecological niche has been compared to that of a

flying squirrel Flying squirrels (scientifically known as Pteromyini or Petauristini) are a tribe of 50 species of squirrels in the family Sciuridae. Despite their name, they are not in fact capable of full flight in the same way as birds or bats, but they a ...

. Its diet consists of leaves, fern fronds, flowers, fruit and invertebrates.

Kōkako and humans

In Māori and modern New Zealand culture

Māori myth refers to the kōkako in several stories. In one notable story, a kōkako gave Māui water as he fought the sun by filling its plump wattles with water and offering it to Māui to quench his thirst. Māui rewarded kōkako for its kindness by stretching its legs until they were lean, long and strong, so that kōkako could easily leap through the forest to find food. The kōkako appears on the reverse side of the New Zealand $50 note. Kokako in a new home

References

External links

Database and map of potential South Island kōkako reports

Kokako Recovery
A website developed by private enthusiasts to promote the Kokako Recovery Programme *
Kōkako vocalizations
(

Xeno-canto xeno-canto is a citizen science project and repository in which volunteers record, upload and annotate recordings of birdsong and bird calls. Since it began in 2005, it has collected over 575,000 sound recordings from more than 10,000 species wo ...

)
TerraNature page on wattlebirds

Artworks featuring Kokako
and *
Specimens of kōkako including albinos
in the collection of the Museum of New Zealand Te Papa Tongarewa
The role of 1080 poison in pest control for kōkako recovery

Kokako Lost - The Last Days of the Great Barrier and Coromandel Crow
A journal of 26 months of field research on kōkako in the southern Coromandel, by Sid Marsh {{DEFAULTSORT:Kokako Callaeas Birds of New Zealand