Herring Gull (argentatus & argenteus)

(last update: February 11, 2013)

Herring Gull sub-adult, February 07 2013, Katwijk, the Netherlands.

Note black on greater primary coverts. 5cy or maybe 6cy bird. W-shape on P5, bajonet on P7, P9 mirror only on innerweb, and full sub-terminal band on P10. Note short white tongue on P10 underside.