Gulls in NW Europe

(last update: September 25, 2011 )

Herring Gull adult, January 23 2013, Katwijk, the Netherlands.

Birds with plain grey greater primary coverts are considered full adult.

Bird below:
- sub-terminal black on P10 small triangles at edges;
- long pale tongue on inner-web P10 strongly curved at end;
- mirror on P9 bleeds onto outer-web;
- sub-terminal black on P5 on outer-web only.