Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)
Larus cachinnans 6CY 231P February 06 2012, Krems, Austria. Picture: Wolfgang Schweighofer.
6CY Caspian Gull, probably ringed as pullus on May 18 2007 at Jankowice, S Poland.
Note white tongue on underside of P10 and dark iris.