Herring Gull (argentatus & argenteus)

(last update: February 11, 2013)

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

Probably 5CY. Tail with obvious black and vestiges of dark immature pattern on primary coverts. Mirror on P10 and P9.
No active moult in primaries yet (no complete moult).