IJmuiden Project - Fred Cottaar, José Verbeek, Maarten van Kleinwee & Mars Muusse(last update: January 01, 2023) |
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Lesser Black-backed Gull (graellsii) Y.BBW adult, April 23 2019, IJmuiden, the Netherlands. Picture: Mars Muusse.Ringed as breeding adult in season 2012 at Forteiland, IJmuiden. Ringed by Fred Cottaar ringing team. below: Lesser Black-backed Gull (graellsii) Y.BBW >11CY, April 23 2019, IJmuiden, the Netherlands. Picture: Mars Muusse.Continental graellsii from this population are also referred to as 'Dutch intergrade', upperparts between medium grey British graellsii and dark grey Scandinavian intermedius. |
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