Albert de Jong
Larus cachinnans 1CY-3CY-4CY V455 November 2008, February 2010 & January 2011, Denmark & the Netherlands.
Ringed in Denmark by Kjeld T Pedersen. Probably, ringed as juvenile on 16 August 2008 at Klintholm Havn, Møn, Denmark (54.57N, 012.28E).
below: 1cy V455 November 16 2008, København, Denmark. Picture: Kjeld Tommy Pedersen.
below: 1cy V455 November 18 2008, København, Denmark. Picture: Lars Krogh.
Coverts and tertials juvenile.
below: 3cy V455 February 17-22 2010, Barneveld, the Netherlands. Picture: Theo Muusse & PieterGeert Gelderblom.
Relatively heavily barred on the greater coverts.
Larus cachinnans 4cy V455 January 28 2011, Barneveld, the Netherlands. Pictures: T. Muusse.
Some black on the bill and dark centres of greater primary covcerts just visible.