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White-necked crow
The white-necked crow (''Corvus leucognaphalus'') is the largest ( in length) of the four Caribbean crow species. Two other species, the Cuban crow (''Corvus nasicus'') and the Jamaican crow (''Corvus jamaicensis''), appear to be very closely related to it sharing several key morphological features. The fourth species from this region, the palm crow (''Corvus palmarum''), would appear to be a later arrival (at least in evolutionary terms) and shows affinities with the fish crow (''C. ossifragus'') of North America and two Mexican species.
A stocky bird, this forest crow is now found principally on the large island of Hispaniola that comprises the countries of Dominican Republic and Haiti. It was also found on Puerto Rico but is now considered to be extinct on that island since the early 20th Century due to considerable forest clearance and hunting. It inhabits both lowland and mountain forest and unlike the related Cuban crow, does not appear to tolerate areas that have been cleared for farming. It often flies high over the forest canopy and soars on thermals unlike the palm crow which rarely if ever soars.
==Description==
The overall appearance is black with a bluish-purple gloss in good light. The black bill is long and deep and curves gently downward to the tip giving the bird a large headed appearance. The nasal bristles do not quite cover the nostrils unlike the majority of species in this genus. There is a patch of dark grey bare skin behind the eye and the base of the lower mandible has a bare strip of the same coloured skin. The iris is a distinctive reddish ochre in colour, and the legs and feet are black.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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