The Citron-crested Cockatoo, Cacatua sulphurea citrinocristata is a medium-sized cockatoo with an orange crest, dark grey beak, pale orange ear patches, and strong feet and claws. The underside of the larger wing and tail feathers have a pale yellow colour. The eye colour ranges from brown through very dark brown to black. Both sexes are similar.
The smallest of the Yellow-crested Cockatoo subspecies, it is endemic to Sumba in the Lesser Sunda Islands in Indonesia. The diet consists mainly of seeds, buds, fruits, nuts and herbaceous plants.