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roadside hawk
The roadside hawk (''Rupornis magnirostris'') is a relatively small bird of prey found in the Americas. This vocal species is often the most common raptor in its range. It has many subspecies and is now usually placed in the monotypic genus ''Rupornis'' instead of ''Buteo''.〔
==Description==
The roadside hawk is long and weighs .〔 Males are about 20% smaller than females, but otherwise the sexes are similar.〔 In most subspecies, the lower breast and underparts are barred brown and white, and the tail has four or five grey bars. Twelve subspecies are usually recognised and there is significant plumage variation between these. Depending on the subspecies involved, the roadside hawk is mainly brown or grey. It is fairly common to observe a touch of rufous (i.e., a light reddish-brown) on the bird's wings, especially when seen in flight.〔 Its call is a very high-pitched piercing squeak. The eyes of adult roadside hawks are whitish or yellow. As suggested by its specific name (''magni'' = large; ''rostri'' = beak), its beak is relatively large.〔
The roadside hawk may be marginally the smallest hawk in the widespread genus ''Buteo'', although Ridgway's hawk and the white-rumped hawk are scarcely larger.〔 In flight, the relatively long tail and disproportionately short wings of the roadside hawk are distinctive. It frequently soars, but does not hover.〔
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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