`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:.....
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http://en.wikipedia.org/wiki/Green-backed_heron
The Green-backed Heron (Butorides striatus) is a small American heron of the order Grallae, family Ardeidae, with short yellowish legs and a short neck; greenish-blue back; neck rusty on side and back, white on front. The young are streaky brown and white on the front and brown on the back. It stalks invertebrate and fish prey, which it stabs with ...
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http://www.probertencyclopaedia.com/browse/BGA.HTM
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