Herring Gull (argentatus & argenteus)

(last update: February 11, 2013)

Herring Gull (argenteus) CUAK 2CY-4CY, February 2010 - March 2012, Koksijde, Belgium. Picture: Peter Adriaens.

Ringed as pullus in June 2009 at Zeebrugge, West-Vlaanderen, Belgium.

below: Herring Gull (argenteus) CUAK 4CY, March 25 2012, Koksijde, Belgium. Picture: Peter Adriaens.

Adult-like primaries and secondaries.

below: Herring Gull (argenteus) CUAK 3CY, May 22 2011, Koksijde, Belgium. Picture: Peter Adriaens.

Complete moult: P4-P10 old.

below: Herring Gull (argenteus) CUAK 3CY, March 26 2011, Koksijde, Belgium. Picture: Peter Adriaens.

No complete moult. 2nd gen flight feathers.

below: Herring Gull (argenteus) CUAK 3CY, January 10 2011, Koksijde, Belgium. Picture: Peter Adriaens.

2nd gen flight feathers.

below: Herring Gull (argenteus) CUAK 2CY, August 01 2010, Koksijde, Belgium. Picture: Peter Adriaens.

P6/P9. Active moult in outer secs and in tail.

below: Herring Gull (argenteus) CUAK 2CY, February 07 2010, Koksijde, Belgium. Picture: Peter Adriaens.

First cycle plumage: old juvenile feathers with replaced, 2nd gen, scaps. Last replaced scaps lack the bold anchor shapes, more plain grey with shaft streak.