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: ''This article is about the African species. For the Asian species sometimes known as the white-crested hornbill, see white-crowned hornbill.'' The white-crested hornbill (''Tropicranus albocristatus''), also known as the long-tailed hornbill, is a species of hornbill (family Bucerotidae) found in humid forests of Central and West Africa. It is monotypic within the genus ''Tropicranus'', but is sometimes included in the genus ''Tockus'' instead. ==Taxonomy== There are three subspecies,〔(【引用サイトリンク】Zoological Nomenclature Resource: Bucerotiformes (Version 9.004) )〕 which differ primarily in the amount of white to their head and neck and the presence or absence of white tips to the wing-coverts: * ''Tropicranus albocristatus albocristatus'' (Cassin, 1848) – Guinea to the Ivory Coast. * ''Tropicranus albocristatus cassini'' (Finsch, 1903) – from Nigeria east to Uganda and south to Angola. * ''Tropicranus albocristatus macrourus'' (Bonaparte, 1850) – Ivory Coast and Ghana. 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「White-crested hornbill」の詳細全文を読む スポンサード リンク
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