Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)
Larus cachinnans 2CY PHBD February 19 2012, Zagreb, Croatia. Picture: Mars Muusse & Ruud Altenburg.
Bird ringed yellow PHBD & metal PLG DN-27156, ringed as pullus on May 24 2011 at Jankowice Babice Malopolskie Poland (50,03333 19,46667).
Post-juvenile moult included no tertials, but inner GC, inner MC, inner LLC, and several of the inner LC.