Cacatua sulphurea; Print; The yellow-crested cockatoo (Cacatua sulphurea) also known as the lesser sulphur-crested cockatoo; is a medium-sized (about 34-cm-long) cockatoo with white plumage; bluish-white bare orbital skin; grey feet; a black bill; and a retractile yellow or orange crest. The sexes are similar. Lessor; the cockatoo used in the TV series Baretta; is thought to be a yellow-crested cockatoo; but is actually a medium sulphur-crested cockatoo.; 1700-1880