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Chatham kākā

Chatham kākā
Temporal range: Holocene
Artist's reconstruction

Extinct (between 1500 and 1650) (NZ TCS)[1]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Psittaciformes
Family: Strigopidae
Genus: Nestor
Species:
N. chathamensis
Binomial name
Nestor chathamensis
Wood, Mitchell, Scofield and Tennyson, 2014[2]

The Chatham kākā or Chatham Island kākā (Nestor chathamensis) is an extinct parrot species previously found on the Chatham Islands, New Zealand.[3][4][2] The first individuals were thought to belong to the New Zealand kākā (Nestor meridionalis), but detailed examination of the subfossil bones showed that they actually belong to a separate endemic species.[5][2] The species became extinct within the first 150 years of the arrival of the Polynesians around 1500, long before any European settlers.[5] No skins or descriptions are available.[5]

Taxonomy

The Chatham kākā is assigned to the genus Nestor in the family Nestoridae, a small group of parrot species native to New Zealand. It is considered to have been more closely related to the kākā (Nestor meridionalis) and the extinct Norfolk kākā (Nestor productus) than to the kea (Nestor notabilis).[5][2]

Ecology

The Chatham kākā was a forest dwelling species[5] of about the same size as the North Island subspecies of the kākā, Nestor meridionalis septentrionalis.[4] However, it had a much broader pelvis, enlarged legs, and a beak that was intermediate between kea and kākā.[2] It had no natural predators (as it was bigger than the New Zealand falcon) and, as is often observed with such island endemics, it is believed to have been a poor flyer.[5] This may have made it more vulnerable to human hunting by the Polynesians.

References

  1. ^ "Nestor chathamensis. NZTCS". nztcs.org.nz. Retrieved 19 April 2023.
  2. ^ a b c d e Wood, J.R.; Mitchell K. J.; Scofield R. P.; Tennyson A. J. D.; Fidler A. E.; Wilmshurst J. M.; Llamas B.; Cooper A. (2014). "An extinct nestorid parrot (Aves, Psittaciformes, Nestoridae) from the Chatham Islands, New Zealand". Zoological Journal of the Linnean Society. 172: 185–199. doi:10.1111/zoj.12164.
  3. ^ Forbes, H. O. (1893). "A list of the birds inhabiting the Chatham Islands". Ibis. 35 (4): 521–546. doi:10.1111/j.1474-919X.1893.tb01240.x.
  4. ^ a b Dawson, E. W. (1959). "The supposed occurrence of Kakapo, Kaka and Kea in the Chatham Islands". Notornis. 8 (4): 106–114.
  5. ^ a b c d e f Millener, P. R. (1999). "The history of the Chatham Islands' bird fauna of the last 7000 years – a chronicle of change and extinction. Proceedings of the 4th International meeting of the Society of Avian Paleontology and Evolution (Washington, D.C., June 1996)" (PDF). Smithsonian Contributions to Paleobiology. 89: 85–109.
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Chatham kākā
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