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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 South Georgia pintail ： ウィキペディア英語版 South Georgia pintail The South Georgia pintail (''Anas georgica georgica''), also misleadingly known as the South Georgian teal,〔 is the nominate subspecies of the yellow-billed pintail (''Anas georgica''), a duck in the dabbling duck subfamily Anatinae. It is endemic to the large (3,756 km2) subantarctic island of South Georgia and its accompanying archipelago, and is a vagrant to the South Sandwich Islands.〔 It was among the birds noted by James Cook in January 1775, on the occasion of the first recorded landing on South Georgia,〔Murphy (1936).〕 and was formerly considered a full species. ==Taxonomy== The duck has long been recognised as a distinct taxon, with its affinities previously considered to be with the teals. Robert Cushman Murphy was the first to demonstrate that it is a pintail, its closest relatives the yellow-billed pintails of South America (now split as the Chilean pintail ''A. g. spinicauda'' and the extinct Niceforo's pintail ''A. g. niceforoi''),〔Murphy (1916).〕 though he retained it as a full species for its isolated distribution and its 16 (rather than 14) rectrices, or tail feathers.〔Weller (1980), p.22.〕 However, the number of retrices in the ducks is variable, with many mainland pintails also having 16 retrices and a few South Georgia pintails even having 18,〔 and the three ducks are now usually lumped as the yellow-billed pintail. 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「South Georgia pintail」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.