Lesser Black-backed Gull (graellsii & intermedius)

(last update: 28-12-2010)

L. f. graellsii H.C11 September 09 2010, Westkapelle, the Netherlands.

Ringed 1cy 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.
Few us replaced and moult gaps in the ls. Score low, as moult gaps receive no value. US: 1-25%, LS: 0%, TOT SCAPS: 1-25%. Two central mc have 2nd gen like pattern and are relatively fresh when compared to adjacent feathers.