Lesser Black-backed Gull (graellsii & intermedius)

(last update: 22-2-2011)

LBBG 3cy November 08 2001, Westkapelle, the Netherlands.

In general this sub-adult seems to be adult-like but some features advocate 3cy:

1. The pinkish basal half of the bill;
2. The upper three tertials have been replaced recently but the white tips are small and almost confined to the inner-web;
3. The outer primary coverts have a brownish-whitish tip and have a brown-hued grey centre;
4. The tips of the outer primaries are relatively small.