Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)
Larus cachinnans 1CY PUKZ August 18 2010, Lubna, Poland. Picture: Michal Rycak.
Yellow PUKZ and metal UKK L-009627, ringed as pullus on June 05 2010, at Cherkasy Kreminchuk reservoir, Ukraine (49,4 32,15).
Juvenile plumage, just starting to moult scapulars. Pale underwing.