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great northern diver| Species of diver Gavia immer, order Gaviiformes. The head, neck, and upper tail-coverts are glossed with deep purplish green on a black background; there is a short transverse bar on the throat collar or middle of the neck; the upper plumage is black, marked with white spots, and the under plumage white. The total length is 70 cm/28 in. |
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