Black Cormorant is a small, slim, totally black cormorant with a greenish sheen to the back and a slender grey hooked bill. In the breeding season, adults have fine white flecks on the head and neck and the green tinge becomes more bronze. Non-breading adult could be duller, lack philoplumages and white nuptial feathering. This species congregates in larger flocks than other cormorants and flies in V-shaped formations.
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