Lesser Black-backed Gull (graellsii & intermedius)

(last update: 28-12-2010)

L. f. graellsii H.460 June 20 2008, Westkapelle, the Netherlands.

Ringed 2cy graellsii "Dutch intergrade", these yellow rings used on islands in N Germany. Birds from these colonies form the transition into Scandinavian intermedius, which start to breed at Denmark, according to Barth's findings in the 60's and 70's: HERE & HERE.
Inner gc and most mc replaced in post-juvenile moult, now old 2nd gen. New feathers stand out by the fresh fringes and greyish base.