Cockatoos-small yellow-crested or in its scientific name Cacatua sulphurea is a bird of medium size, with a length of about 35 cm, of the genus Cacatua. This bird is almost all the feathers are white. In his head there is a topknot of yellow that can be enforced. Cockatoos-small yellow-crested beaked black, the skin around his eyes were bluish and his feet gray. Feathers flying and his tail is also colored yellow. Female birds are similar with the male birds. The regional distribution of the cockatoos-small yellow-crested is the lesser Sunda Islands, Sulawesi, Bali, and Timor, where there are still forest-primary forest and secondary. Poultry feed intelligent and fond of friends this consists of grains, nuts, and assorted fruits. Female birds incubate two to three eggs in a nest in a tree hole. Based on from the loss of forest habitat and illegal capture continue to trade, as well as the area and population where these birds are found very limited, cockatoos-small yellow-crested evaluated as critical on the IUCN Red List. This species is listed in CITES Appendix I.