| 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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 Hybrid scores
 Ring codes
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 | Caspian Gull cachinnans  C|1 3CY, August 09 2025, IJmuiden, the Netherlands.  
        
          | You can participate in this project too! 
            Please send in your observations of colour ringed birds to: ring@buijsecoconsult.nl |  Ringing details: 
        
    | Country | Metal | Plastic | Date | Sex | Age | Wing | H+B | Bill | Tarsus | Gonys | Swab | Loc |  
          |  |  |  |  |  |  |  |  |  |  |  |  |  |  
          | NLA | .5641143 | G-C|1 | 9-8-2025 | F | 3CY | 431 | 125,5 | 56,2 | 71,9 | 18 | 25B10367 | Kennemerstrand, IJmuiden |  Tibia ring G-C|1, originally, ringed as pullus Larus cachinnans on May 14 2024 in nest P9R0-2024 at Lelystad, the Netherlands. Found dead on June 04 2024. Ring used again in 2025.
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