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:
- full sub-terminal black on P10;
- medium pale tongue on inner-web P10;
- mirror on P9 confined to inner-web;
- sub-terminal black on P5 absent.