Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)
Larus cachinnans 2CY PLDC September 20 2013, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.
Yellow PLDC and metal PLG DN-28846; ringed as pullus on May 25 2012 at Kozielno, Paczkow, S-SW Poland, (50°28' N, 16°58' E).
In this area are mixed breeding colonies (near Katowice), with far most birds breeding here are cachinnans, but in this area also records of very few michahellis from the south (e.g. ringed female from Italy) and argentatus from eastern Germany are possible (see PDF).
PLDC is cachinnans. Complete moult finished, P10 fully grown and gap in secondaries closed. A subsequent partial autmn moult only involves a few feather tracts. Here is a bird with a classic sequence: replacing upper TT, inner GC, (almost?) complete MC row, and several LLC and/or LC. Still no completely grey saddle in PLDC.
Last picture with 1CY cachinnans (left) and same aged 2CY argentatus (right, note differences in coloration).