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 broken at the shaft;
- short pale tongue on inner-web P10;
- small mirror on P9;
- broken sub-terminal black on P5.