Lesser Black-backed Gull 2CY, May 29 2017, Heemskerk, the Netherlands.
      Bird is not ringed, no provenance on origin. Intermedius-type 2CY bird. 
       Post-juvenile moult include many inner wing-coverts and tertials. Also R1-R3 replaced. 
        Complete moult not started: P1 not missing.
       
        
      
     
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