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Cockatoo

Birds Guide

Cockatoo

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Cockatoos
Moluccan Cockatoo (Cacatua (Cacatua) moluccensis)
 
Moluccan Cockatoo (Cacatua (Cacatua) moluccensis)
Scientific classification
Kingdom: Animalia
 
Phylum: Chordata
 
Class: Aves
 
Order: Psittaciformes
 
Family: Cacatuidae
GR Gray, 1840
Subfamily
Microglossinae
Calyptorhynchinae
Cacatuinae

A cockatoo is any of the 21 bird species belonging to the family Cacatuidae. Along with the Psittacidae family (the true parrots), they make up the order Psittaciformes. The name cockatoo originated from the Malay name for these birds, kakaktua, which translates literally as older sister (from kakak, "sister," and tua, "old").

Cockatoos share many features with other parrots including the characteristic curved beak shape and a zygodactyl foot, with two forward toes and two backwards toes. They differ, however in a number of characteristics, including the often spectacular movable headcrest, the presence of a gall bladder and some other anatomical details, and their lack of the Dyck texture feather composition which causes the bright blues and greens seen in true parrots. Cockatoo species are also, on average, larger than the true parrots (however, the cockatiel is a small cockatoo and the very large parrots include the Hyacinth Macaw by length and the Kakapo by weight.)

Cockatoos have a much more restricted range than the true parrots, occurring naturally only in Australia and nearby islands. Eleven of the 21 species exist in the wild only in Australia, while seven species occur in Indonesia, New Guinea, and other south Pacific islands. Three species occur in both New Guinea and Australia.

Contents

Cockatoos as endangered or vulnerable species

All of the species of cockatoo are protected by the CITES international agreement, which makes the trade of wild-caught specimens of endangered or vulnerable species illegal.

The following cockatoo species are classified as endangered species (on CITES appendix 1 list).

  • Goffin's cockatoo, Cacatua goffini
    Red-vented Cockatoo, Cacatua haematuropygia
    Moluccan Cockatoo, Cacatua moluccensis
    Yellow-crested Cockatoo, Cacatua sulphurea
    Palm Cockatoo, Probosciger aterrimus

All of the other cockatoo species are classified at vulnerable (on CITES appendex 2 list).

Systematics

Phylogeny of the family Cacatuidae based on Brown & Toft (1999)
Phylogeny of the family Cacatuidae based on Brown & Toft (1999)

Brown & Toft (1999) reviewed the existing evidence and additional mitochondrial 12S rRNA sequence data to arrive at a well-supported phylogeny of the cockatoos. They could distinguish 3 subfamilies:

  1. The all-black Palm Cockatoo represents an early divergence; it was previousöly sometimes grouped with the other black species but this is incorrect.
  2. The dark cockatoos; sexually dichromatic species which have ample melanin in their plumage and some red, yellow or orange on wing, tail and face, barred feathers on wing, tail and/or body as well as contrasting ear area spotting in females, while males have the corresponding feathers unbarred and may lack the ear spotting. This group includes the remaining black cockatoos, the Gang-gang Cockatoo and, interestingly, the cockatiel which had previously been placed in a subfamily of its own (Nymphicinae) or even as a broad-tailed parrot.
  3. The remaining species, which are all hypomelanistic and not sexually dimorphic.

The genera Calyptorhynchus and Cacatua can be further resolved into two subgenera each, and in the latter case as a distinct third lineage the white-and-pink Major Mitchell's Cockatoo, which is intermediate in coloration between the grey-and-pink Galah and the white Cacatua. It is best recognized as a monotypic genus Lophocroa. Indeed, pending further research, all subgenera could conceivably be raised to species rank.

FAMILY CACATUIDAE

  • Subfamily Microglossinae
    • Genus Probosciger
      • Palm Cockatoo, Probosciger aterrimus
  • Subfamily Calyptorhynchinae - dark cockatoos
    • Genus Callocephalon
      • Gang-gang Cockatoo, Callocephalon fimbriatum
    • Genus Nymphicus
      • Cockatiel, Nymphicus hollandicus
    • Genus Calyptorhynchus
      • Subgenus Calyptorhynchus - black-and-red cockatoos
        • Red-tailed Black Cockatoo, Calyptorhynchus (Calyptorhynchus) banksii
          Glossy Black Cockatoo, Calyptorhynchus (Calyptorhynchus) lathami
      • Subgenus Zanda - black-and-yellow/white cockatoos
        • Yellow-tailed Black Cockatoo, Calyptorhynchus (Zanda) funereus
          Short-billed Black Cockatoo, Calyptorhynchus (Zanda) latirostris
          Long-billed Black Cockatoo, Calyptorhynchus (Zanda) baudinii
  • Subfamily Cacatuinae - white cockatoos
    • Genus Eolophus
      • Galah, Eolophus roseicapilla
    • Genus Lophocroa
      • Major Mitchell's Cockatoo, Lophocroa leadbeateri
    • Genus Cacatua
      • Subgenus Licmetis - corellas
        • Long-billed Corella, Cacatua (Licmetis) tenuirostris
          Western Corella, Cacatua (Licmetis) pastinator
          Little Corella, Cacatua (Licmetis) sanguinea
          Red-vented Cockatoo, Cacatua (Licmetis) haematuropygia
          Goffin's Cockatoo, Cacatua (Licmetis) goffini
          Ducorps' Cockatoo, Cacatua (Licmetis) ducorpsii
      • Subgenus Cacatua - true white cockatoos
        • Sulphur-crested Cockatoo, Cacatua (Cacatua) galerita
        • Yellow-crested Cockatoo, Cacatua (Cacatua) sulphurea
        • Blue-eyed Cockatoo, Cacatua (Cacatua) ophthalmica
          Moluccan Cockatoo or Salmon-crested Cockatoo, Cacatua (Cacatua) moluccensis
        • Umbrella Cockatoo, Cacatua (Cacatua) alba

References

  • Brown, D.M. & Toft, C.A. (1999): Molecular systematics and biogeography of the cockatoos (Psittaciformes: Cacatuidae). Auk 116(1): 141-157.

External links


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Birds Guide, made by MultiMedia | Free content and software

This guide is licensed under the GNU Free Documentation License. It uses material from the Wikipedia.


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