Gulls in NW Europe
(last update: September 25, 2011
Herring Gull adult, January 16 2013, Katwijk, the Netherlands.
Wing-tip pattern not often found in European Herring Gull.
Mirror on P10 separated from tip. Long pale tongue on P10 (almost 'thayeri pattern'). Normally, a long pale tongue is combined with no, or very restricted sub-terminal black.
Mirror on P9 restricted to inner-web. (seems to be absent on left wing?).
Sub-terminal black on P5 restricted to outer-web.
