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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Hawaiian duck ： ウィキペディア英語版 Hawaiian duck The Hawaiian duck (''Anas wyvilliana'') or koloa is a species of bird in the family Anatidae that is endemic to the large islands of Hawaii. Taxonomically, the koloa is closely allied with the mallard (''A. platyrhynchos''),.〔 It differs in that it is monochromatic (with similarly marked males and females) and non-migratory.〔 As with many duck species in the genus ''Anas'', Hawaiian duck and mallards can interbreed and produce viable offspring, and the koloa has previously been considered an island subspecies of the mallard.〔 However, all major authorities now consider this form to be a distinct species within the mallard complex.〔〔(【引用サイトリンク】title=IOC World Bird List v.5.2 )〕〔(【引用サイトリンク】title=Hawaiian Duck Anas wyvilliana )〕 Recent analyses indicate that this is a distinct species that arose through ancient hybridization between mallard and Laysan duck (''Anas laysanensis''). The native Hawaiian name for this duck is ''koloa maoli'' (meaning "native duck"), or simply koloa. This species is listed as endangered by the IUCN Red List of Threatened Species, and its population trend is decreasing.〔BirdLife International 2013. Anas wyvilliana. The IUCN Red List of Threatened Species. Version 2014.2. Retrieved on 22 October 2014.〕 ==Physiology== 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「Hawaiian duck」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.