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Brewer's sparrow (''Spizella breweri'') is a small, slim species of American sparrow in the family Emberizidae. This bird was named after the ornithologist Thomas Mayo Brewer.〔(Brewer's Sparrows (''Spizella breweri'') ). Beautyofbirds.com (previously avianweb.com). Retrieved on 2014-05-05.〕 ==Description and systematics== Adults have grey-brown backs and speckled brown crowns, both with dark streaks, and a pale eye-ring. Their wings are brown with light wing bars and the underparts are pale grey. Their bill is pale with a dark tip and they have a long notched tail. They are similar in appearance to the clay-colored sparrow (''S. pallida'') but do not have a pale stripe on the crown or grey neck patch. The male sings to defend a nesting territory. The song is a long varied mix of notes and trills. Males have two distinct types of songs – classified as short and long songs. There are two distinct subspecies: * Brewer's sparrow proper, ''Spizella breweri breweri'' :Found in brushy areas, especially with sagebrush, in southern parts of western Canada and in the western United States. * Timberline sparrow, ''Spizella breweri taverneri'' :Found in thicketed areas around the tree line in the Rockies of northern British Columbia, the southern Yukon and southeastern Alaska. These birds are somewhat darker and larger than the southern subspecies; some consider this to be a separate species. 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「Brewer's sparrow」の詳細全文を読む スポンサード リンク
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