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Sudan golden sparrow
The Sudan golden sparrow (''Passer luteus'') is a small bird in the sparrow family, found to the south of the Sahara Desert in Africa. It is a popular cage bird, and in aviculture it is known as the golden song sparrow. The Arabian golden sparrow and this species are sometimes considered one species, the golden sparrow.
== Description ==
The Sudan golden sparrow is a smaller sparrow, at 12–13 cm (4.7–5.1 in) in length, with a wingspan of 5.7–7 cm (2.2–2.8 in). Males are distinctive in their bright yellow head and underparts, deep chestnut brown wings and back, and two white wingbars. In the breeding season the male's plumage is brighter still, and the bill changes colour from horn to shiny black. Females are pale sandy-buff with yellowish face, light brown wings, a back faintly streaked with chestnut, and pale yellow fading to whitish on the underparts. Juveniles are similar to females, but greyer. About 10 weeks after hatching young males may start to get a yellow wash around the shoulder area. Its basic call is a ''chirp'' or ''tchirrup'', similar to that of other sparrows. Variations include a song-like call, and a rapid rhythmic ''che-che-che''.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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