The Herring Gulls observed in central England in winter appear to be of at least four distinct types. Can they be related to known races? Where do they originate?

Most species of gull show relatively little individual variation in adult plumage, bare part coloration and size. Lesser Black-backed Larus fuscus and, especially, Herring Gulls L. argentatus do, however, vary quite markedly. Thi


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