Herring Gull (argentatus & argenteus)

(last update: February 11, 2013)

Herring Gull 3CY, July 09 2013, Katwijk, the Netherlands.

Secondaries and tail still old second generation; secondaries with extensive brown centre and vermiculation, tail with much distal black and proximal vermiculation. Active moult in primaries (complete moult in summer months): P3/P6.