Gulls in NW Europe

(last update: September 25, 2011 )

Herring Gull (argenteus) 1CY & 4CY 6.168.269 October 2011 & July 2014, IJmuiden, the Netherlands.

Ringed as juvenile on July 25 2011 at Maasvlakte - Rotterdam, The Netherlands.

below: Herring Gull (argenteus) 1CY 6.168.269 October 30 2011, IJmuiden, the Netherlands. Pictures: Maarten van Kleinwee.

1cy European Herring Gull in first-winter (1st cycle) plumage. Most of the scapulars have been replaced by second-generation feathers.

below: Herring Gull (argenteus) 4CY 6.168.269 July 30 2014, IJmuiden, the Netherlands.

4CY bird, note old secondaries with adult-like pattern (grey with white tips) in combination with immature brown markings. Complete moult: P4/P7 (P7 folded behind P8 here).