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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 Western jackdaw ： ウィキペディア英語版 Western jackdaw The western jackdaw (''Corvus monedula''), also known as the Eurasian jackdaw, European jackdaw, or simply jackdaw, is a passerine bird in the crow family. Found across Europe, western Asia and North Africa, it is mostly resident, although northern and eastern populations migrate south in winter. Four subspecies are recognised, which mainly differ in the colouration of the plumage on the head and nape. Linnaeus first described it formally, giving it the name ''Corvus monedula''. Later analysis of its DNA suggests that, with its closest relative the Daurian jackdaw, it is an early offshoot from the genus ''Corvus'', and possibly distinct enough to warrant reclassification in a separate genus, ''Coloeus''. The common name derives from the word "jack", meaning "small", and "daw", the native English name for the bird. Measuring in length, the western jackdaw is a black-plumaged bird with a grey nape and distinctive pale-grey irises. It is gregarious and vocal, living in small groups with a complex social structure in farmland, open woodland, on coastal cliffs, and in urban settings. An omnivorous and opportunistic feeder, it eats a wide variety of plant material and invertebrates, as well as food waste from urban areas. Western jackdaws are monogamous and build simple nests of sticks in cavities in trees, cliffs, or buildings. About five pale blue or blue-green eggs with brown speckles are laid and incubated by the female. The young fledge in four to five weeks. ==Systematics== 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「Western jackdaw」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.