Albert de Jong
Larus cachinnans 5CY V483 August 01 2010, Damhussøen, Denmark. Picture: Mikkel Holck.
Jesper Brinkmann: "The bird in the picture is 5CY. It was ringed in late December 2008 by Kjeld and Morten by Damhussøen and since then, it has been recorded here several times, but has not yet seen anywhere else, even if it disappears for periods from Damhussøen."
Active complete moult: P7-P10 old, central primaries missing / growing. Inner LLC missing. Note black centre on greater primary covert, indicating 4CY / 5CY age. Dark iris and parallel bill.