Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)
Larus cachinnans 2CY XTDW December 28 2013, Herstal, Belgium. Picture: Robin Gailly.
Green XTDW, ringed as pullus on June 07 2013 at REDDERN (2km NE), Oberspreewald-Lausitz, Brandenburg, Germany (51°42'00"N 014°06'00"E).
Bird from a mixed colony; but probably pure cachinnans on head, coloration, greater covert pattern, and jizz. Slightly short bill with obvious gonys maybe within limits for cachinnans.