Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)
Larus cachinnans 2CY PSST February 17 2012, Zagreb, Croatia. Picture: Ruud Altenburg.
Bird ringed yellow PSST & metal UKK L-011076, ringed as pullus on June 10 2011 at Cherkasy Kreminchuk reservoir Ukraine (49,401 32,15).
Quite some spots in side of the neck.