Lesser Black-backed Gull sub-adult, June 24 2013, Noordwijk, the Netherlands.
Sub-adult LBBG, probably 4CY bird. Note extensive pattern on greater primary coverts. Small and diffuse mirror on P10. Distinct adult-like pattern on P2-P5 indicate this bird is older than 3CY.
This bird is now in its complete moult: P1 growing/missing, P2-P10 old.
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