Herring Gull (argentatus & argenteus)

(last update: February 11, 2013)

Herring Gull 5cy, February 07 2013, Katwijk, the Netherlands.

In general adult-like plumage, with small patches of dark on greater primary coverts and isolated black spot in tail. Mirrors on P9 and P10. Most probably argentatus. Note black on outerweb of P4.