IJmuiden Project - Fred Cottaar, José Verbeek, Maarten van Kleinwee & Mars Muusse

(last update: January 01, 2023)

Lesser Black-backed Gull (graellsii) Y.BSJ 1CY-2CY, July 2014 & August 2015, IJmuiden, the Netherlands. Picture: Maarten van Kleinwee.

Ringed as pullus in breeding season 2014 at Forteiland, IJmuiden. Ringed by Fred Cottaar ringing team.

below: Lesser Black-backed Gull (graellsii) Y.BSJ 2CY, August 02 2015, IJmuiden, the Netherlands. Picture: Maarten van Kleinwee.

Continental graellsii from this population are also referred to as 'Dutch intergrade', upperparts between medium grey British graellsii and dark grey Scandinavian intermedius.

Local bird in complete moult: P5/P8. P1-P5 new 2nd gen, P6 growing, length at P4, P7 missing, P8-P10 old juvenile. PMS=30. Moult in secs: S1 new 2nd gen, S2-S3 growing, with tips just visible, then few secs missing, central and inner secs old juvenile. Rectrices: all juvenile tail-feathers have been shed, now complete tail growing 2nd gen.

below: Lesser Black-backed Gull (graellsii) Y.BSJ 1CY, July 2014, IJmuiden, the Netherlands. Picture: Maarten van Kleinwee.

Juvenile, processed when ringed.