Lesser Black-backed Gull adult 1B December 06 2012, Landfill VRSU de Colmenar Viejo, Madrid, Spain. Picture: Delfín González.
Ringed adult graellsii, ringed in the SW Netherlands by Roland-Jan Buijs.
Primary moult finished. Slightly more than average black on bill and hint of dark centres on greater primary coverts may indicate near-adult plumage.
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