| 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
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 Nonbreeding season
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 | Caspian Gull cachinnans  4|= 1CY, colony De Kreupel, the Netherlands.Tibia  G-4|= and metal NLA 5.623.906, ringed as  pullus Larus cachinnans on May 19 2023 at De Kreupel, Holland (5247.00 N 513.00 E). 
      Ringer  Leon Kelder. Recoveries:29-10-2024 Westkapelle (Zeedijk), Zeeland, NL 5.132,00 N 326,00 E colourring read Joop Scheijbeler
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