Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)
Larus argentatus sensu lato 1P46 adult, May 16 2013, Wytyckie Lake - Urszulin, Poland. Picture: Łukasz Bednarz ringing team.
For 2012, breeding location of 150 pairs cachinnans, of which 54 adults ringed and 158 pulli in 2012 (pers comm. Łukasz Bednarz).
Breeding bird trapped at the nest. Adult, with limited speckling in iris (0-1%) and much black in wingtip, in these two traits differing from average cachinnans and therefore considered "Larus argentatus sensu lato".