Herring Gull- Zilvermeeuw (argentatus & argenteus)

(last update: December 15, 2011 )

Herring Gull (argenteus) YAZF 1CY & 3CY, August 2011 & April 2013, IJmuiden & Brouwersdam, the Netherlands.

Ringed as pullus on July 11 2011 at IJmuiden, the Netherlands.

below: Herring Gull (argenteus) YAZF 3CY, April 07 2013, Brouwersdam, the Netherlands. Picture: Frank van der Meer.

Almost all scaps grey. Partial autumn moult only included 2x upper tertials. Base of bill starts to turn yellow in spring.

below: Herring Gull (argenteus) YAZF 1CY, August 25 2011, IJmuiden, the Netherlands.

Few scaps replaced.