OLROG'S GULL Larus atlanticus

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Until recently lumped with the previous species, Olrog's Gull breeds in only a few colonies on islands off the coast of Argentina, both range and numbers (c.300 pairs) being very small. Obviously sharing a common ancestor with Band-tailed Gull, the juvenile is distinctively different, this being one of the main criteria for its current status as a full species.

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