yellow crested cockatoo - Cacatua sulphurea - sulphur crested cockatoo

The Yellow-crested Cockatoo, ''Cacatua sulphurea'', also known as the Lesser Sulphur-crested Cockatoo, is a medium-sized cockatoo with white plumage, bluish-white bare orbital skin, grey feet, a black bill, and a retractile yellow crest. The sexes are similar.