Lesser Black-backed Gull H252 3CY, August 01 2010, Koksijde, Belgium. Picture: Peter Adriaens.
Ringed as pullus in 2008 at Helgoland, N Germany. This colony holds birds in the transition between graellsii and intermedius.
Complete moult: P1-P4 replaced for 3rd gen primaries (P4 with sub-terminal black), P5 growing. P7-P10 old 2nd gen. Pretty classic graellsii-type bird, with primaries and secondaries old 2nd gen in late winetr and no few tail feathers replaced last winter.
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