Lesser Black-backed Gull graellsii Y.BZB 1CY, July-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.BZB 1CY, August 02 2015, IJmuiden, the Netherlands. Picture: Maarten van Kleinwee.
Juvenile plumage. At the beach.
below: Lesser Black-backed Gull graellsii Y.BZB 1CY, July 06 2015, IJmuiden, the Netherlands. Picture: Maarten van Kleinwee.
Juvenile, processed when ringed.
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