Herring Gull (argentatus & argenteus)

(last update: February 11, 2013)

Herring Gull sub-adult, June 09 2013, Noordwijk, the Netherlands.

Probably 4CY, typically have adult-like P1-P2 (& P3). Tail with obvious black and dark immature pattern on primary coverts and secondary centres. No mirror on P10.
Active moult in primaries (complete moult): P1/P2. Note new MC.