Lesser Black-backed Gull (graellsii & intermedius)

(last update: May 17 2015)

Lesser Black-backed Gull graellsii Y.BSJ 1CY-2CY, July 2014 & August 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.
Ringed as pullus on July 06 2015, at forteiland, IJmuiden, the Netherlands.

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

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.