Albert de Jong
Larus cachinnans 1CY PUDT November 20 2010, Lubna, Poland. Picture: Michal Rycak.
Yellow PUDT, probably ringed as pullus on June 05 2010, at Cherkasy Kreminchuk reservoir, Ukraine (49,4 32,15).
Difficult angle, but it seems none of the visible coverts have been replaced.