| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
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   | Caspian  Gull cachinnans  4|X 1CY-2CY, the Netherlands & France. Picture: Leon Kelder & Philippe J. Dubois.Tibia  G-4|X and metal NLA 5.623.968, ringed as  pullus Larus cachinnans on June 09 2023 at De Kreupel, Holland (5247.00 N 513.00 E). 
  Ringer  Leon Kelder. Recoveries:18-06-2023 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
 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
 06-07-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 07-07-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 08-07-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 15-07-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 31-07-2023 Sheringham (Strand), Norfolk, ENGELAND 5.256,00 N 112,00 E colourring read Chris Clamsdell
 04-08-2023 Cromer (Strand), Norfolk, ENGELAND 5.255,00 N 118,00 E colourring read Richard Bonser
 26-01-2024 Gueltas (Vuilstort), Morbihan, FRANKRIJK 4.805,00 N 248,00 W colourring read Philippe J. Dubois
 26-07-2024 Oss (Vuiloverslag), Noord-Brabant, NL 5.147,00 N 532,00 E colourring read Jaap van der Linden
 below: Caspian Gull cachinnans  4|X 2CY, Gueltas - Morbihan, France. Picture: Philippe J. Dubois.
 below: Caspian Gull cachinnans  4|X 1CY, July 14 2023, De Kreupel, the Netherlands. Picture: Leon Kelder.
 
 
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