Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)
Larus cachinnans P342 2CY-3CY, July 2014 & February 2015, Rotterdam, the Netherlands. Picture: Cornelis Fokker & Merijn Loeve.
No data yet, but probably Green P342 and metal (PLG) DN22406, ringed as pullus on May 24 2013 at Kozielno Paczkow Opolskie Poland (50°28'35" N, 16°58'54" E). This is a mixed breeding colony in Poland, with most birds breeding here cachinnans, but in this area also records of very few michahellis are possible (see PDF). P342 obviously classic cachinnans.
below: Larus cachinnans 3CY P342 February 24 2015, Rotterdam, the Netherlands. Picture: Merijn Loeve.
No mirror on 2nd gen P10. Very white on head and underparts.
below: Larus cachinnans 2CY P342 July 03 2014, Rotterdam, the Netherlands. Picture: Cornelis Fokker.
Bird halfway complete moult, with outer primaries still old juvenile.