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Genus Butorides
Greenbacked Heron - The Striated Heron, Butorides striata, also known as Mangrove Heron or Little Heron, is a small heron. Striated Herons are mostly non-migratory and noted for some interesting behavioral traits. Their breeding habitat is small wetlands in the Old World tropics from west Africa to Japan and Australia, and in South America. Vagrants have been recorded on oceanic islands, such as Chuuk and Yap in the Federated States of Micronesia, the Marianas and Palau; the bird recorded on Yap on February 25 1991, was from a continental Asian rather than from a Melanesian population, while the origin of the bird seen on Palau on May 3 2005 was not clear.
Green heron - The Green Heron is a small heron of North and Central America. It was long considered conspecific with its sister species the Striated Heron , and together they were called "Green-backed Heron". Birds of the nominate subspecies are extremely rare vagrants to western Europe; individuals from the Pacific coast of North America may similarly stray as far as Hawaii.