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

(last update: January 01, 2023)

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Y.BSX
NLA x.xxx.xxx
Lesser B-backed Gull
sex?, pullus
ringed: July 07 2014
Forteiland IJmuiden, -
 
Relations:
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Lesser Black-backed Gull (graellsiiY.BSX 1CY, July 07-22 2015, IJmuiden & Leiden, 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 (graellsiiY.BSX 1CY, July 22 2014, Leiden, 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.

Juvenile plumage. Some 30 KM south of the colony already.

below: Lesser Black-backed Gull (graellsiiY.BSX 1CY, July 07 2014, IJmuiden, the Netherlands. Picture: Maarten van Kleinwee.

Juvenile, processed when ringed.