Albert de Jong
Larus cachinnans 5CY & 7CY 355P January 2012 & January 2104, Kent, UK. Picture: Michael Southcott & Dominic Mitchell.
Green 355P and metal PLG DN-21700, ringed as pullus on May 22 2008 at Zwirownia Zakole, near Jankowice, S Poland (50°02' N, 19°28' E). Zakole = gravel pit, Zwirownia is along the river Oder.
below: cachinnans 7CY 355P January 23 2014, Viridor, Crayford, UK. Picture: Michael Southcott.
below: cachinnans 5CY 355P January 21 2012, Crossness, Kent, UK. Picture: Michael Southcott.
Found by Richard Bonser and Michael Southcott. Clearly black markings on greater primary coverts indicate immaturity.
below: cachinnans 5CY 355P January 09 2012, Crossness, Kent, UK. Picture: Dom Mitchell.
This bird was seen here early, 14 months ago, by Dominic.