4cy Iceland Gull / Larus glaucoides, Brouwersdam (The Netherlands) on 15 February 2012
Probably a female, note the small bill. Typical for this age are the pale brownish wash at the upperwing-coverts, primary-coverts, primaries and the rectrices. The underwing-coverts (especially the lesser coverts) are brownish colored. The neck, breast and flanks are faintly dark-mottled. And the dull greenish bill shows a typical black subterminal band and lacks red of the gonys-spot.
From: Ies Meulmeester, Wednesday 15 February 2012, 20:22
From: Ies Meulmeester, Wednesday 15 February 2012, 20:23