Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)
Larus cachinnans 2CY PHPU February 19 2012, Zagreb, Croatia. Picture: Mars Muusse.
Bird ringed yellow PHPU & metal PLG DN-27538, ringed as pullus on May 26 2011 at Jankowice Babice Malopolskie Poland (50,03333 19,46667).
Post-juvenile moult included upper tertials, inner GC, inner & central MC, inner & single central LLC, and several of the inner LC.