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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 African silverbill ： ウィキペディア英語版 African silverbill The African silverbill (''Lonchura cantans'') is a small passerine bird formerly considered conspecific with the Asian species Indian silverbill, (''Lonchura malabarica''). This estrildid finch is a common resident breeding bird in dry savanna habitat, south of the Sahara Desert. This species has also been introduced to other countries such as Portugal, Qatar and USA. ==Taxonomy== In early literature, African silverbill (''Lonchura cantans'') and Indian silverbill (''L. malabarica'') were treated as conspecific. In 1943, Jean Théodore Delacour firmly united both species in his revision of the Estrildinae. However, in 1964, James M. Harrison first studied the two in a strictly comparative manner and concluded that they were two separate species. He discovered that although the call notes were similar, the songs are distinctly different in form, but sharing a common pattern. They are sympatric in the south of the Arabian Peninsula and there is no record of natural hybridization. From Harrison's personal observation of birds in captivity, each of the two forms evinced a preference for its own kind. In 1985, Kakizawa and Watada confirmed Harrison's conclusion. They confirmed the genetic difference of the two species by the means of protein electrophoresis. In 1990, Sibley and Monroe accept the two as distinct species. Molecular sequence divergence studies indicate that this species along with the Indian siverbill are basal, having diverged from the common ancestors of other Lonchurae about 11 MYA. This and other evidence including differences in the arrangement of down in chicks and behaviour leads some authors to placing them in the separate genus ''Euodice''. Studies in molecular phylogeny suggests that the Estrildinae may have originated in India and dispersed thereafter towards Africa and Pacific Ocean habitats.〔 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「African silverbill」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.