With its white plumage and bright yellow crest, the sulphur-crested cockatoo (Cacatua galerita) is one of Australasia’s most parrot species. The crest is erectile and can reach up to 14 centimetres in length. The undersurfaces of the wings and tail are washed with pale yellow, while the bill and feet are black and dark-grey respectively. The sexes are almost identical, except for the eye, which is brown in the male and red-brown in the female. It is found in wooded habitats in Australia, New Guinea, and some of the islands of Indonesia. They can be locally very numerous, leading to them sometimes being considered pests.