Larus fuscus fuscus & L. f. intermedius, upper-part coloration in Scandinavia.
Illustration based on E. K. Barth: The
circumpolar systematics of Larus argentatus and Larus fuscus
with special reference to the Norwegian populations, IN: Contribution No. 86, Zoological Museum, University of
Although figures have been prepared with most care, I take full responsibility for all errors in any chart and table.
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