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The great blue heron (''Ardea herodias'') is a large wading bird in the heron family Ardeidae, common near the shores of open water and in wetlands over most of North America and Central America, as well as the Caribbean and the Galápagos Islands. It is a rare vagrant to Europe, with records from Spain, the Azores, England, and the Netherlands. An all-white population found only in the Caribbean and southern Florida was once treated as a separate species and known as the great white heron. Flying heron ==Taxonomy== The great blue heron was one of the many species originally described by Carl Linnaeus in his 18th-century work, ''Systema Naturae''. The great blue heron is replaced in the Old World by the very similar grey heron (''Ardea cinerea''), which differs in being somewhat smaller (), with a pale gray neck and legs, lacking the browner colors that great blue heron has there. It forms a superspecies with this and also with the cocoi heron from South America, which differs in having more extensive black on the head, and a white breast and neck. The five subspecies are:〔 * ''A. h. herodias'' Linnaeus, 1758, most of North America, except as below * ''A. h. fannini'' Chapman, 1901, the Pacific Northwest from southern Alaska south to Washington; coastal * ''A. h. wardi'' Ridgway, 1882, Kansas and Oklahoma to northern Florida, sightings in southeastern Georgia * ''A. h. occidentalis'' Audubon, 1835, southern Florida, Caribbean islands, formerly known as a separate species, the great white heron * ''A. h. cognata'' Bangs, 1903, Galápagos Islands 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「great blue heron」の詳細全文を読む スポンサード リンク
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