Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)
Larus cachinnans 1CY-4CY PKNX December 2012 - October 2015, France & Poland. Picture: Liliane Rogon, Patrick Fontaine, Janusz Wójcicki & Alain Fossé.
Yellow PKNX, ringed as pullus on May 25 2012, at Kozielno, Paczkow, S-SW Poland, (50°28' N, 16°58' E).
below: Larus cachinnans 4CY PKNX October 23 2015, Gennevilliers, France. Picture: Liliane Rogon.
Plain grey greater primary coverts, much adult-like now in 4CY.
below: Larus cachinnans 3CY PKNX November 13 2014, Gennevilliers, France. Picture: Patrick Fontaine.
Large mirror on 3rd gen P9 and P10. Only few markings on primary coverts and in tail.
below: Larus cachinnans 3CY PKNX April 30 2014, Nysa, Poland. Picture: Janusz Wójcicki.
At only 25 km from the hatching colony. 2nd gen flight feathers and bird in 'summer plumage'. P1 still present.
below: Larus cachinnans 1CY PKNX December 04 2012, CET Champteussé-sur-Baconne, France. Picture: Alain Fossé.
Inner coverts replaced. Mottled on underparts.