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Harris's hawk
The Harris's hawk (''Parabuteo unicinctus'') formerly known as the bay-winged hawk or dusky hawk, is a medium-large bird of prey that breeds from the southwestern United States south to Chile and central Argentina. Birds are sometimes reported at large in Western Europe, especially Britain, but it is a popular species in falconry and these records almost certainly all refer to escapes from captivity.
The name is derived from the Greek ''para'', meaning beside, near or like, and the Latin ''buteo'', referring to a kind of buzzard; ''uni'' meaning once; and ''cinctus'' meaning girdled, referring to the white band at the tip of the tail. John James Audubon gave this bird its English name in honor of his ornithological companion, financial supporter, and friend Edward Harris.
The Harris' hawk is notable for its behavior of hunting cooperatively in packs consisting of tolerant groups, while other raptors often hunt alone. It is the Harris's hawk's intelligence which leads to a social nature which results in easier training and has led to the Harris' hawk to become a popular bird for use in falconry.〔
==Description==
This medium-large hawk is roughly intermediate in size between a peregrine falcon (''Falco peregrinus'') and a red-tailed hawk (''Buteo jamaicensis''). Harris' hawks range in length from and generally have a wingspan of about 〔Clark, W. S. and B. K. Wheeler. (1987). ''A Field Guide to Hawks of North America''. Houghton Mifflin Co. Boston.〕 They exhibit sexual dimorphism with the females being larger by about 35%. In the United States, the average weight for adult males is about , with a range of , while the adult female average is , with a range of .〔Hamerstrom, F. (1978). External sex characters of Harris' Hawks in winter. ''Raptor Res.'' 12:1–14.〕 They have dark brown plumage with chestnut shoulders, wing linings, and thighs, white on the base and tip of the tail, long, yellow legs and a yellow cere. The vocalizations of the Harris's hawk are very harsh sounds.〔
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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