Herring Gull (argentatus & argenteus)
(last update: February 11, 2013)
Herring Gull 4CY, February 21 2014, Katwijk, the Netherlands.
3rd gen flight feathers: adult-like inner and central primaries, no mirror on P10. Secondaries grey with white tips and some markings.
Limited black in tail. Brown markings on many coverts.
Right bird also 3rd cycle (4CY).