| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
 Home Project InfoInternational trend
 National trend
 Site characteristics
 Breeding biology
 Fecundity
 Food resources
 Nonbreeding season
 Breeding species
 Hybrid scores
 Ring codes
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   | Caspian Gull cachinnans  0|W 2CY, June 13 2024, Kornwerderzand, the Netherlands. Picture: Japke van Assen.Tibia  G-0|W and metal NLA 5.629.645, 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
 03-07-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 13-06-2024 Kornwerderzand (Afsluitdijk), Friesland, NL 5.301,00 N 512,00 E colourring read Japke van Assen
 below: Caspian Gull cachinnans  0|W 2CY, June 13 2024, Kornwerderzand, the Netherlands. Picture: Japke van Assen.
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