| Coordinators: Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
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 |  Caspian Gull cachinnans 4.6 2CY, February 24 2024, Navia - Asturias, Spain. Picture: Ignacio Pérez González.Red  tibia  ring r[4.6] and metal NLA 5.629.608, ringed as pullus Larus cachinnans on May 12 2023 at De Kreupel, Holland (5247.00 N 513.00 E) - ringer Leon Kelder. Recoveries:24-02-2024 Navia (Strand), Asturias, SPANJE 4.333,00 N 640,00 W colourring read Ignacio Pérez González
 25-06-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 27-06-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 29-06-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 01-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 09-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 below: Caspian Gull cachinnans 4.6 2CY, February 24 2024, Navia - Asturias, Spain. Picture: Ignacio Pérez González.
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