| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
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 | Caspian Gull cachinnans  1|X 1CY, colony De Kreupel, the Netherlands.Tibia  G-1|X and metal NLA 5.623.831, ringed as  pullus Larus cachinnans on May 12 2023 at De Kreupel, Holland (5247.00 N 513.00 E). 
      Ringer  Leon Kelder. Recoveries:19-05-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E captured by ringer Leon Kelder
 01-07-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 03-07-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 04-07-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 26-09-2023 Enkhuizen (Vuurtoren de Ven), Noord-Holland, NL 5.244,00 N 516,00 E colourring read A.J. Laansma
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