Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)
Larus cachinnans 1CY PHPP October 07 2011, Katy Rybackie, Poland. Picture: Michal Polakowski.
Yellow PHPP, ringing data pending. Probably bird ringed as pullus on May 26 2011 at Jankowice Babice Malopolskie Poland (50,03333 19,46667).
Post-juvenile moult included much of the side of the neck and breast and flanks; new feathers more greyish and with fine vermiculation.