Herring Gull (argentatus & argenteus)

(last update: February 11, 2013)

Herring Gull (argenteus) 2CY, July 30 2014, IJmuiden, the Netherlands.

In complete moult. P1-P6 fully grown, P7 growing, P8 missing, P9-P10 old 1st gen. PMS=35. Central rectrices dropped (tail feather moult centrifugal, replacement outwards), outer feathers still juvenile and worn. Outermost secondary S1 replaced, S2-S3 missing. (Almost) all coverts replaced fro 2nd gen.