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Hawaiian hawk
The Hawaiian hawk or ''io'' (''Buteo solitarius'') is a raptor of the ''Buteo'' genus endemic to Hawaii, currently restricted to the Big Island. Buteos tend to be easily recognized by their bulky bodies relative to their overall length and wingspan. The ''io'' is the only hawk that is native to Hawaii, and fossil evidence indicates that it inhabited the island of Hawaii, Molokai, Oahu, and Kauai at one time. Today, it is known to breed only on the Big Island, in stands of native ''ōhia lehua'' (''Metrosideros polymorpha'') trees. The species is protected as an endangered species in the United States. However, the IUCN classifies the species as Near Threatened.〔
==Description==
The Hawaiian hawk measures approximately 40 to 46 centimeters (16 to 18 in) in length. The female, which weighs on average, is larger than the male, which averages .〔()〕 Two color phases exist: a dark phase (dark brown head, breast, and underwings), and a light color phase (dark head, light breast and light underwings). Feet and legs are yellowish in adults and greenish in juveniles. During breeding season one of the pair, possibly the female, has a distinctive yellow forecap area just above the upper mandible.
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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