Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)
Larus cachinnans 2cy PLG DN-24974 February & October 2009, Germany & the Netherlands. Picture: Armin Deutsch, Ruud Altenburg & Mars Muusse.
Ringed as pullus on May 22 2008 at Żwirownia Aakole A, Jankowice, Babice, Małopolskie, Poland (50°02'N 19°28'E).
below: cachinnans 2cy PLG DN-24974 October 09 2009, IJmuiden, the Netherlands. Picture: Ruud Altenburg & Mars Muusse.
At IJmuiden beach, distance: 1069 km. 2nd gen flight feathers. Note partial moult in median and inner greater coverts.
below: cachinnans 2CY PLG DN-24974 February 27 2009, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.
Classic bird in 1W plumage: flat head, long slim bill, pale on underparts and head, simple pattern on fresh scapulars, juvenile tertails with diffuse tip and thin fringe, simple pattern on (inner) GC, pale underwing, Venetian blind on inner primaries lost due to obvious grow waves in primaries, apical spots on outerwebs of inner primaries, long thin legs.
below: white band over the base of primaries and band over the central primary coverts. Probably 'hunger stripes'?