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The yellow-crested cockatoo (''Cacatua sulphurea'') also known as the lesser sulphur-crested cockatoo, is a medium-sized (approximately 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. The yellow-crested cockatoo is found in wooded and cultivated areas of East Timor and Indonesia's islands of Sulawesi and the Lesser Sundas. It is easily confused with the larger〔(BirdLife Species Factsheet ), retrieved 10 February 2010〕〔(Birds in backyards factsheets: Sulphur-crested Cockatoo )〕 and more common sulphur-crested cockatoo, which has a more easterly distribution and can be distinguished by the lack of pale yellow coloring on its cheeks (although some sulphur-cresteds develop yellowish patches). Also, the yellow-crested cockatoo's crest is a brighter color, closer to orange.〔(Yellow-crested and sulphur-crested cockatoo on Flickr - Photo Sharing! )〕 The citron-crested cockatoo, which is a subspecies of the yellow-crested cockatoo, is similar, but its crest is clear orange.〔 The yellow-crested cockatoo's diet consists mainly of seeds, buds, fruits, nuts and herbaceous plants. ==Taxonomy== Traditionally, four subspecies have been recognized: * ''Cacatua sulphurea sulphurea'' (nominate subspecies) – Sulawesi and nearby smaller islands. * ''Cacatua sulphurea abbotti'' (Abbott's lesser sulphur-crested cockatoo) – Masalembu Islands. * ''Cacatua sulphurea citrinocristata'' (citron-crested cockatoo) – Sumba. * ''Cacatua sulphurea parvula'' (Timor sulphur-crested cockatoo) – Sumbawa, Komodo, Flores, Timor and various other islands in the Lesser Sundas. Based on recent evidence, three additional subspecies should be recognized (bringing the total to seven):〔N.J. Collar, N.J.; and Marsden, S.J. (2014). ''The subspecies of Yellow-crested Cockatoo (Cacatua sulphurea).'' Forktail 30.〕 * ''Cacatua sulphurea djampeana'' – Tanah Jampea. * ''Cacatua sulphurea occidentalis'' – Lesser Sundas from Lombok to Alor (thereby restricting ''C. p. parvula'' to Timor). * ''Cacatua sulphurea paulandrewi'' – Tukangbesi Islands. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Yellow-crested cockatoo」の詳細全文を読む スポンサード リンク
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