The yellow-crested cockatoo (Cacatua sulphurea) is among the smaller cockatoo types that have white feathers with bright yellow crest, yellow ear patches, and pale yellow wash on the underside of its wings and tail. It has a slender black bill, dark grey feet, and expressive crest movements used for communication and display. More petite than other white cockatoos, it is agile and highly social, often seen perching high in forest canopies or moving in small, vocal flocks.