| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
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   | Caspian Gull cachinnans  3|T 1CY-3CY, 2023-2025, Spain & the Netherlands. Picture: Ernesto Reyes Lara,  Thijs Horst & Mars Muusse.Tibia  G-3|T and metal NLA 5.623.899, ringed as  pullus Larus cachinnans on May 19 2023 at De Kreupel, Holland (5247.00 N 513.00 E). 
      Ringer  Leon Kelder. Recoveries:08-07-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 22-12-2023 Vitoria-Gasteiz (Vuilstort), Alava, SPANJE 4.248,00 N 241,00 W colourring read Ernesto Reyes Lara
 11-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 30-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 13-08-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 29-08-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 13-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst, M. Muusse & N. Colpaert
 below: Caspian Gull cachinnans  3|T 3CY,  July 13 2025, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.
 below: Caspian Gull cachinnans  3|T 1CY, December 22  2023, Vitoria-Gasteiz - Alava, Spain. Picture: Ernesto Reyes Lara.
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