The Blue-eyed Cockatoo, Cacatua ophthalmica, is a large, approximately 50 cm (20 in) long, mainly white cockatoo with a mobile crest, a black beak, and a light blue rim of featherless skin around each eye, that gives this species its name. Like all cockatoos and many parrots, the Blue-eyed Cockatoo can use one of its zygodactyl feet to hold objects and to bring food to its beak whilst standing on the other foot; nevertheless, amongst bird species as a whole this is relatively unusual.