Herring Gull (argentatus & argenteus)

(last update: February 11, 2013)

Herring Gull sub-adult, November 12 2015, Katwijk, the Netherlands.

Likely in 3rd cycle, with much white in the tail and a few (inner) secondaries that show a grey centre and white tip. However, secondaries and primaries much 2nd gen like with thin arrowhead patterns, even on P1-P3. Central primaries with brown pattern, not really blackish. No mirror on P10 and no bold white tips on outer primaries.