Lesser Black-backed Gull 1cy RR1S September 30 2012, Landfill VRSU de Colmenar Viejo, Madrid, Spain. Picture: Delfín González.
Only few US replaced. Ringed 1cy graellsii, ringed in France (île de Ré, project run by Julien Gernigon's; white rings with code of R:A1A type on graellsii, michahellis and argenteus).
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