Herring Gull (argentatus & argenteus)

(last update: February 11, 2013)

Herring Gull adult, April 09 2014, Katwijk, the Netherlands.

Adult flight feathers. P10 mirror merges with white tip (just broken sub-terminal band in right wing). Mirror on P9 only on innerweb. Black diffuse line on innerweb of P5.