Lesser Black-backed Gull Y.AMS4CY, June 22 2013, Noordwijk, the Netherlands. Picture Maarten van Kleinwee.
Ringed as pullus green YAMS, ringed on July 05 2010 at Forteiland - IJmuiden, the Netherlands. Adult-like flight feathers but still with many immature patterned feathers. Mirror on P10. Note greater primary coverts with brown centres.
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