Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)
Larus cachinnans 1CY PDHN October 19 2010, Den Haag, the Netherlands. Picture: Frank van der Meer.
Yellow PDHN and metal PLG DN-18606; ringed as pullus on May 27 2010, at Kozielno Paczkow Opolskie Poland (50,48333 16,96667). Recorded 4 times in 2010, along the coast in the Netherlands.
Scapulars replaced, but all wing-coverts and tertials still juvenile. Note snowy white head.