Albert de Jong
Larus cachinnans 1CY PLG DN-28035 July 21 2012, Simrishamn, Sweden. Picture: Hans Larsson.
Metal ring from Poland, PLG DN-28035, cachinnans ringed as pullus on May 10 2012 by Marcin Sidelnik, in Wyspa na Wisle, Kepa Nadbrzeska (= Island in the Vistula River, Kepa Nadbrzeska), near Warschau, Poland (52°01' N, 21°13' E). This colony holds a mixed population, with cachinnans dominating and argentatus, michahellis and even single fuscus breeding as well. Details on the composition of these breeding colonies, see LOCATIONS and RESULTS and ORIGIN & MIGRATION.
Classic cachinnans-looking bird.