| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
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 Future
 | Caspian Gull cachinnans  C:F 1CY,  2025,  the Netherlands & England. Picture: Steve Nuttall, Thijs Horst & Mars Muusse.
        
          | You can participate in this project too! 
            Please send in your observations of colour ringed birds to: ring@buijsecoconsult.nl |  Tibia  Y-C:F and metal Arnhem NLA 5.633.751, ringed as  pullus Larus cachinnans on May 16 2025 at IJsselmeer (De Kreupel), Holland (5247.00 N 513.00 E), by ringer Leon Kelder. Recoveries:13-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst, M. Muusse & N. Colpaert
 18-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst & M. Loeve
 14-08-2025 Stafford (Belvide Reservoir), Staffordshire, ENGELAND 5.241,00 N 212,00 W colourring read Steve Nuttall
 Data for nest H19 - 2025. 
        
        
        
        
        
        
        
        
        
        
        
        
          | Metal    ring | Colour ring | Date | Species | Age | Clutch size | Location | Nest code | Ringer | Head+Bill | Mass | Wing | Parents |  
          | NLA 5633751 | y-C:F | 16-5-2025 | Caspian Gull | pullus | 2 eggs | the Netherlands, De Kreupel - eiland H. | H19 | Leon Kelder | 49,3 | 73,0 |  |  |  
          | NLA 5633752 | y-C:G | 16-5-2025 | Caspian Gull | pullus | 2 eggs | the Netherlands, De Kreupel - eiland H. | H19 | Leon Kelder | 50,9 | 80,0 |  |  |  below: Caspian Gull cachinnans  C:F 1CY, August 14 2025, Stafford, England. Picture: Steve Nuttall.
 below: Caspian Gull cachinnans  C:F 1CY,  July 13 2025, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.
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