Herring Gull (argentatus & argenteus)

(last update: February 11, 2013)

Herring Gull (argenteus) Y.CTB 1CY, August 28 2018, IJmuiden, the Netherlands.

Ringed in breeding season 2018 at forteiland - IJmuiden, the Netherlands.

Several 2nd gen like wing-coverts in inner half of the wing (e.g. GC6-8; but also in MC and LLC).