Borderline of Countable
10,000 Birds
JANUARY 19, 2017
Last but not least, there are only two or three conformed sightings of this northern species, rare in Serbia. Southern Europe’s Herring become a full species, the Yellow-legged Gull Larus cachinnans. How to tell these two apart (and how to tell them that they are now separate species and are not supposed to hybridise)?
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