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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