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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 Northern rough-winged swallow ： ウィキペディア英語版 Northern rough-winged swallow The northern rough-winged swallow (''Stelgidopteryx serripennis'') is a small swallow. Adults are in length, brown on top with light underparts and a forked tail. They are similar in appearance to the bank swallow but have a dusky throat and breast. They are closely related and very similar to the southern rough-winged swallow, ''Stelgidopteryx ruficollis'', but that species has a more contrasting rump, and the ranges do not quite overlap. Their breeding habitat is near streams, lakes and river banks across North America. They nest in cavities near water, usually a burrow in dirt; they do not usually form colonies. The normal clutch is four to eight eggs, incubated by the female for 13 days, with another 20 to fledging. They migrate to the Gulf Coast of the United States and south to Central America. These birds forage in flight over water or fields, usually flying low. They eat insects. "Rough-winged" refers to the serrated edge feathers on the wing of this bird; this feature would only be apparent when holding this bird. ==References== 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「Northern rough-winged swallow」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.