ABSTRACT Information on the appearance, behaviour and ecology of taxa within the evolutionarily young ‘large white-headed gull’ complex (taxa currently grouped by three species, Lesser Black-backed Gull Larus fuscus, Herring Gull L. argentatus and Yellow-legged Gull L. cachinnans) is of interest to those ornithologists who study their identification, systematics and speciation. A sharp discrep

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