Lesser Black-backed Gull graellsii Y.BWD 1CY, June-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 June 29 2015, at forteiland, IJmuiden, the Netherlands.
below: Lesser Black-backed Gull graellsii Y.BWD 1CY, August 02 2015, IJmuiden, the Netherlands. Picture: Maarten van Kleinwee.
Juvenile plumage missing some upper scaps. At the beach.

below: Lesser Black-backed Gull graellsii Y.BWD 1CY, June 29 2015, IJmuiden, the Netherlands. Picture: Maarten van Kleinwee.
Juvenile, processed when ringed.

|