Distribution and Habitat
The Red-tailed Black Cockatoo principally occurs across the drier parts of Australia. It is widespread and abundant in a broad band across the northern half of the country, where it has been considered an agricultural pest, with more isolated distribution in the south. It is found in a wide variety of habitats, from shrublands and grasslands through eucalypt, sheoak and Acacia woodlands, to dense tropical rainforests. The bird is dependent on large, old eucalypts for nesting hollows, although the specific gums used vary in different parts of the country.
Cockatoos are not wholly migratory, but they do exhibit regular seasonal movements in different parts of Australia. In the northern parts of the Northern Territory, they largely leave areas of high humidity in the summer wet season. In other parts of the country cockatoo seasonal movements tend to follow food sources, a pattern recorded in Northern Queensland, and New South Wales. In southwest Western Australia, both extant subspecies appear to have a north-south pattern; northwards after breeding in the case of subspecies naso, while movements by subspecies samueli in the wheatbelt can be irregular and unrelated to the seasons.
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