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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 Red-legged kittiwake ： ウィキペディア英語版 Red-legged kittiwake The red-legged kittiwake (''Rissa brevirostris'') is a seabird species in the gull family Laridae. It breeds in the Pribilof Islands, Bogoslof Island and Buldir Island in the Bering Sea off the coast of Alaska, and the Commander Islands, Russia and spends the winter at sea. ==Description== The red-legged kittiwake is a very localised subarctic Pacific species. Apart from the distinguishing feature implicit in its name, it is very similar to its better known relative, the black-legged kittiwake; other differences include the shorter bill, larger eyes, a larger, rounder head and darker grey wings, and in the juveniles, which barely differ from the adults, lacking the black tail band and 'W' across the wings of juvenile black-legged kittiwakes. Juveniles take three years to reach maturity. Adults are long, with an wingspan and a body mass of .〔''CRC Handbook of Avian Body Masses'' by John B. Dunning Jr. (Editor). CRC Press (1992), ISBN 978-0-8493-4258-5.〕 Like the Pacific race of black-legged kittiwake, the red-legged kittiwake has a well-developed hind toe. As occasional individual black-legged kittiwakes have reddish legs, any reports of red-legged away from the subarctic Pacific must record all of the other differences, not just the leg colour, for acceptance by bird recording authorities. 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「Red-legged kittiwake」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.