Lesser Black-backed Gull 1cy 2Y December 02 2012, Landfill VRSU de Colmenar Viejo, Madrid, Spain. Picture: Delfín González.
Ringed 1cy graellsii, ringed at Maasvlakte, the Netherlands in 2012.
US: 75-99%, LS: 1-25%, TOT SCAPS: 50-75%. All coverts and tertials juvenile.
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