| 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
 Future
   | Caspian Gull cachinnans  4|1 2CY, February 19 2024, Grutte Brekken, the Netherlands. Picture: Ted Fronik.Tibia  G-4|1 and metal NLA 5.623.909, ringed as  pullus Larus cachinnans on May 19 2023 at De Kreupel, Holland (5247.00 N 513.00 E). 
        Ringer  Leon Kelder. Recoveries:19-02-2024 De Friese Meren. See HERE.
 29-06-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 below: Caspian Gull cachinnans  4|1 2CY, February 19 2024, Grutte Brekken, the Netherlands. Picture: Ted Fronik.
 |