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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 Yellow-billed loon ： ウィキペディア英語版 Yellow-billed loon The yellow-billed loon (''Gavia adamsii''), also known as the white-billed diver, is the largest member of the loon or diver family. Breeding adults have a black head, white underparts and chequered black-and-white mantle. Non-breeding plumage is drabber with the chin and foreneck white. The main distinguishing feature from great northern loon is the longer straw-yellow bill which, because the culmen is straight, appears slightly uptilted. It breeds in the Arctic and winters mainly at sea along the coasts of the northern Pacific Ocean and northwestern Norway; it also sometimes overwinters on large inland lakes. It occasionally strays well south of its normal wintering range, and has been recorded as a vagrant in more than 22 countries. This species, like all divers, is a specialist fish-eater, catching its prey underwater. Its call is an eerie wailing, lower pitched than great northern diver. ==Taxonomy and etymology== First described by English zoologist George Robert Gray in 1859 based on a specimen collected in Alaska, the yellow-billed loon is a monotypic species, with no subspecies despite its large Holarctic range.〔 It is closely related to the great northern loon, which it strongly resembles in plumage and behaviour; some taxonomists consider the two species to be allopatric forms of the same superspecies. Both are thought to have evolved from a population of black-throated loons which colonized the Nearctic and were subsequently cut off from other populations.〔 The genus name ''Gavia'' comes from the Latin for "sea mew", as used by ancient Roman naturalist Pliny the Elder. The specific epithet ''adamsii'' honours Edward Adams, a British naval surgeon and naturalist who sketched and collected numerous species, including this one,〔 on several trips to the Arctic.〔 The word "loon" is thought to have derived from the Swedish ''lom'', the Old Norse or Icelandic ''lómr'', or the Old Dutch ''loen'', all of which mean "lame" or "clumsy", and is a probable reference to the difficulty that all loons have in moving about on land.〔 "Diver" refers to the family's underwater method of hunting for prey, while "yellow-billed" and "white-billed" are references to the bird's distinctively pale bill.〔 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-billed loon」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.