Larus fuscus fuscus 2cy C53K March 02 2012, Ashdod, Israel. Picture Amir Ben Dov.
2cy fuscus from Finland. Almost all wing-coverts (except outer GC and several LC) replaced for 2nd gen. Active moult in tail. Primaries and secondaries still juvenile. Nice illustrative bird to show that the moult does not necessarily follow the sequence of the "summer complete moult" (which starts with P1, and is only then followed by wing-covert moult and rectrices moult).
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