Lesser Black-backed Gull 2CY, June 01 2017, Utrecht, the Netherlands.
      Bird is not ringed, no provenance on origin. Intermedius-type 2CY bird. 
      Advanced post-juvenile moult in late winter / spring, including wing-coverts, tertials, rectrices and secondaries.  
        Now complete moult has started: P1 growing, P2 missing, P3-P10 old juvenile.
       
 
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