Lesser Black-backed Gull 2CY, May 29 2017, Heemskerk, the Netherlands.
Bird is not ringed, no provenance on origin. Graellsii-type 2CY bird.
Post-juvenile moult include several inner wing-coverts and tertials. Also R1 right and R2 left replaced.
Complete moult started: P1-P4 missing, P1 growing.
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