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The grey-lined hawk (''Buteo nitidus'') is a smallish raptor found in open country and forest edges. It is sometimes placed in the genus ''Asturina'' as ''Asturina nitida''. The species has been split by the AOU from the grey hawk. The grey-lined hawk is found from southern Costa Rica to Argentina. The grey-lined hawk is in length and weighs average. The adult has a pale grey body, the tail is black with three white bands and the legs are orange. It has fine white barring on the upper parts. Immature birds have dark brown upperparts, a pale-banded brown tail, brown-spotted white underparts and a brown streaked buff head and neck. This species is quite short-winged, and has a fast agile flight for a ''Buteo''. It feeds mainly on lizards and snakes, but will also take small mammals, birds and frogs. It usually sits on an open high perch from which it swoops on its prey, but will also hunt from a low glide. The nest is of sticks and built high in a tree. The usual clutch is one to three, usually two white to pale blue eggs.〔(【引用サイトリンク】title=Animal Diversity (Asturina nitida) )〕 The young take about 6 weeks to fledging. ==References== 〔 * Baillie, J.E.M.; Hilton-Taylor, C. & Stuart, S.N. (eds.) (2004): ''2004 IUCN Red List of Threatened Species. A Global Species Assessment.'' IUCN, Gland, Switzerland and Cambridge, UK. ISBN 2-8317-0826-5 * ffrench, Richard; O'Neill, John Patton & Eckelberry, Don R. (1991): ''A guide to the birds of Trinidad and Tobago'' (2nd edition). Comstock Publishing, Ithaca, N.Y.. ISBN 0-8014-9792-2 * Hilty, Steven L. (2003): ''Birds of Venezuela''. Christopher Helm, London. ISBN 0-7136-6418-5 * Stiles, F. Gary & Skutch, Alexander Frank (1989): ''A guide to the birds of Costa Rica''. Comistock, Ithaca. ISBN 0-8014-9600-4 * Full text via (BioOne ). (''Asturina'' merged into ''Buteo'', citing Riesing, et al. 2003.) * Riesing, M. J., L. Kruckenhauser, A. Gamauf, and E. Haring. 2003. Molecular phylogeny of the genus Buteo (Aves: Accipitridae) based on mitochondrial marker sequences. Molecular Phylogenetics and Evolution 27:328–342. 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「Grey-lined hawk」の詳細全文を読む スポンサード リンク
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