Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)
Larus cachinnans 3P49 sub-adult, April 26 2014, 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, with dark marks on greater primary coverts, probably 5CY/ near-adult. With deep white tongue on P10, and full broad band on P5; small black spot on P4. Limited speckling in iris. Red orbital ring and gape. Faint red on upper mandible; black on lower (faint) and upper mandible. Pale yellow legs.