Herring Gull (argentatus & argenteus)

(last update: February 11, 2013)

Herring Gull (argentatus) 4CY, March 01 2014, Katwijk, the Netherlands.

3rd gen flight feathers. Adult-like grey inner primaries, sub-terminal bands on central primaries blackish with sharp borders, sometimes mirror on P10 (and even P9). Bill-base and iris often yellowish. But also many immature markings in greater primary coverts, wing-coverts, often in the tail and normally broad bill-band.