The yellow-crested cockatoo (Cacatua sulphurea) also known as the lesser sulphur-crested cockatoo, has a retractile yellow or orange crest. Found in wooded and cultivated areas of East Timor and Indonesia's islands of Sulawesi and the Lesser Sundas, it is easily confused with the larger and more common sulphur-crested cockatoo – which can be distinguished by the lack of pale yellow colouring on its cheeks – and is similar to the umbrella (white) cockatoo. Like the umbrella cockatoo, the yellow-crest cockatoo can expand the feathers on its head in a grand display. The yellow crested is one of the species of cockatoos where it’s possible to tell the sex of the bird by its eye colour. The female eyes are reddish, and the males have black eyes. Around the eyes the skin is bluish in both the male and female.