| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
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   | Caspian Gull cachinnans 1|5 1CY-3CY,    2023-2025, the Netherlands & Belgium. Picture: Nathalie Colpaert, Thijs Horst & Mars Muusse.Tibia  G-1|5 and metal NLA 5.623.806, ringed as  pullus Larus cachinnans  on May 12 2023 at De Kreupel, Holland (5247.00 N 513.00 E). 
      Ringer  Leon Kelder. Recoveries:30-06-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 01-07-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 06-08-2023 Oostende (Haven), West-Vlaanderen, BELGIE 5.113,00 N 255,00 E colourring read Nathalie Colpaert
 18-06-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 19-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst & M. Muusse
 28-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst & M. Muusse
 08-04-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst & M. Muusse
 below: Caspian Gull cachinnans  1|5 3CY, April 08 2025, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.
 
 
 
 
 below: Caspian Gull cachinnans  1|5 2CY, July 19 2024, colony De Kreupel, the Netherlands.  Picture: Thijs Horst & Mars Muusse.
 below: Caspian Gull cachinnans 1|5 1CY,  August 06 2023, Oostende, Belgium. Picture: Nathalie Colpaert.    
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