Lesser Black-backed Gull 3CY, June
19 2017, Katwijk, the Netherlands.
3CY bird which returned with arrested moult in primaries. White tail, 2nd gen secondaries.
Left wing: P1 missing, P2 3rd gen, P4 2nd gen, P5-P6 3rd gen, P7-P10 2nd gen. Complete moult: P1 missing.
Right wing: P1 growing, P2-P3 missing in complete moult, P4 2nd gen, P5-P6 3rd gen, P7-P10 2nd gen.
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