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"Green-backed heron" is a collective term for certain herons. Small and compact among herons, these birds often feature green plumage – rare among the Ardeidae –, in particular on the back, wings and scapulars. They were formerly believed to make up a single species ''Butorides striatus'', but are now treated as three largely allopatric species: * Striated heron, ''Butorides striata'' – Widespread throughout the Old World tropics and in South America (Note that the grammatical gender of the specific name has been corrected from ''striatus'') * Lava heron, ''Butorides sundevalli'' – Endemic to the Galápagos Islands off Ecuador * Green heron, ''Butorides virescens'' – Widespread from temperate North America south to Panama These herons are tool-using animals. They are regularly seen picking up objects to use as a fishing lure, attracting prey fish.〔Norris (1975), Boswall (1983), Walsh ''et al.'' (1985), Robinson (1994)〕 Image:Striated Heron (Butorides striata) -Santa Cruz -Galapagos.jpg|Striated heron on the Galápagos Islands Image:Lava heron (Butorides sundevalli) -fishing on Galapagos.jpg|Lava heron on the Galápagos Islands Image:Butorides virescens at Tarpon Springs.jpg|Green heron in Florida ==Footnotes== 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「Green-backed heron」の詳細全文を読む スポンサード リンク
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