Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)
Larus cachinnans 1P17 sub-adult, May 15 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. Sub-adult, with many immature feathers in all tracts, probably (retarded) 4CY. Dense speckling in iris. Red orbital ring and gape. No red on upper mandible; black on the upper and black on the lower mandible. Pink legs.