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 Most of the scapulars have been replaced by second-generation feathers.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).
