Lesser Black-backed Gull (graellsii & intermedius)(last update: May 17 2015) |
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lbbg 1cy May lbbg 2cy January lbbg 3cy Jan-April lbbg sub-ad Jan-April lbbg adult January |
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. 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. |