| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
 Home Project InfoInternational trend
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 | Caspian Gull cachinnans  C|F 1CY,  2025, IJmuiden, the Netherlands. Picture: Jan Zorgdrager, Thijs Horst, Fred Cottaar & Mars Muusse.
        
          | 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 | Mass | H+B | Bill | Tarsus | Gonys | Swab | Loc |  
          | NLA | .6254648 | G-C|F | 30-7-2025 | M | 1CY | 457 | 747 | 127,2 | 55,5 | 70,5 | 17,4 | 25B10358 | Haringhaven, IJmuiden |  Tibia ring G-C|F and metal NLA 6.254.648 was originally used for 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.
 below: Caspian Gull cachinnans  C|F 1CY, August 07 2025, IJmuiden, the Netherlands. Picture: Jan Zorgdrager.
 below: Caspian Gull cachinnans  C|F 1CY, July 30 2025, IJmuiden, the Netherlands. Picture: Thijs Horst, Fred Cottaar & Mars Muusse.
 
 
 
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