| Cocoi Heron (Ardea cocoi) (aka White-necked Heron) |
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| Brazil The White-necked Heron is found in South America and forms a superspecies with the Great Blue Heron (Ardea herodias) of North America and the Grey Heron (Ardea cinerea) of Europe, Asia and Africa. Being parts of a superspecies they are all very similar. The White-necked has more black on the head than the other two. |
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| The White-necked Heron is the largest Brazilian heron. Its diet is similar to other herons but it has also been known to eat small caiman. Its Brazilian name is Socó-grande: socó meaning "the bird that stands only on one leg" |
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| The fifth photo shows an immature bird which is much greyer and shows more streaking on the underparts and lower neck. There are illustrations in Hilty & Brown, Page 61 and in HBW, Volume 1, Page 404
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