Gang gang cockatoo taxonomy
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(For a detailed comparison of the five species or forms in this complex, see Distinguishing Features: Identification of Yellow-crested Cockatoos.) Adding to the potential for confusion, hybridization between similar species has been documented in some feral flocks. Accurate identification is potentially significant in these areas to distinguish the several endangered species from their commoner relative, the Sulphur-crested Cockatoo ( C. The potentially confusing species do not occur together naturally, but several of them coexist in feral flocks: e.g., in Honolulu, Singapore, and Taiwan. Several white cockatoos of the genus Cacatua are extremely similar, with inconspicuous differences in plumage and bare parts coloration. Although invasive exotic species are generally disfavored, there is a conservation argument for making exceptions in some cases-such as the Salmon-crested Cockatoos in Honolulu and White Cockatoos in San Juan, Puerto Rico, which do not compete with any of the few remaining island endemic bird species. These flocks persist in part due to the longevity of individuals, but also in some cases through breeding that could lead to self-sustaining populations.
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Released captive cockatoos have formed feral flocks in urban areas, including Hong Kong, Honolulu, San Juan (Puerto Rico), Singapore, and a few parts of Taiwan. goffiniana)-are in various stages of endangerment.
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alba) cockatoos, and the Tanimbar Corella ( C. Trapping has driven the Philippine endemic Red-vented Cockatoo ( Cacatua haematuropygia) close to extinction as a wild species, and several of its Indonesian relatives-the Yellow-crested ( C. Several cockatoo populations are subject to intense persecution due to their value in the illicit cagebird trade.