Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)
Larus michahellis 1P31 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, obviously different from breeding cachinnans, therefore labeled in the database as "Larus argentatus sensu lato", but in all respects resembling adult michahellis (which it most likely is, but hybrid offspring not excluded).