| 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
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 Ring codes
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   | Caspian Gull cachinnans  3|K 2CY,  April 18 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.Tibia  G-3|K and metal NLA 5.623.892, ringed as  pullus Larus cachinnans on May 19 2023 at De Kreupel, Holland (5247.00 N 513.00 E). 
  Ringer  Leon Kelder. Recoveries:28-8-2023 Lion-sur-Mer (Strand), Calvados, FRANKRIJK 4.918,00 N 18,00 W colourring read Bruno Dumeige
 18-04-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
 05-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 below: Caspian Gull cachinnans  3|K 2CY,  April 18 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.
 
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