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cinereous harrier
The cinereous harrier (''Circus cinereus'') is a South American bird of prey of the harrier family. Its breeding range extends from the Tierra del Fuego through Argentina and Chile to Bolivia, Paraguay, Peru and southern Brasil; and across the Andes north to Colombia. The bird's population is declining but due to its large range is not considered vulnerable.〔http://www.birdlife.org/datazone/speciesfactsheet.php?id=3408〕 The term ''cinereous'', deriving from the Latin word for ashy, describes its colouration.〔http://www.arkive.org/cinereous-harrier/circus-cinereus/〕
==Description==
The male's plumage is dark grey above with black wingtips and a white rump. The underparts are pale grey, with a rufous streaked belly. The female's plumage is brown above, with a white rump, and cream coloured underneath, with a streaked belly similar to the males. The female is larger than the male with an average size of compared to the male's . The wingspan is . Since the tail comprises about 56% of this raptor's total length, this species ties with the long-tailed hawk as the raptor with the longest tail relative to its body size.〔''Raptors of the World'' by Ferguson-Lees, Christie, Franklin, Mead & Burton. Houghton Mifflin (2001), ISBN 0-618-12762-3〕
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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