The Yellow-crested Cockatoo, Cacatua sulphurea, is a medium-sized cockatoo inhabitant to wooded and cultivated areas of Timor-Leste and
Indonesia’s islands of Bali, Timor, Sulawesi and Lesser Sunda Islands. There is also a feral population of these birds in Hong Kong. The large group has apparently developed from a number of caged birds that have been released into the wild over many years.
The Yellow-crested Cockatoo is about 13.75 inches long. It has all-white feathers, bluish bare orbital skin, gray feet, black bill and yellow crest. Both sexes are similar. Their diet consists mainly of seeds, buds, fruits, nuts and herbaceous plants. The female lays 2 to 3 eggs in a tree hole. Both parents incubate the eggs for about 27 days.
The Yellow-crested Cockatoo is critically endangered. Numbers have declined dramatically due to illegal trapping for the cage-bird trade. The current population is estimated at less than 10,000.