| 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  B:E 1CY,  2025,  the Netherlands. Picture: Theo Muusse, 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-B:E and metal Arnhem NLA 5.633.713, 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:13-7-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst, M. Muusse & N. Colpaert
 Data for nest Q56 - 2025. 
        
        
        
        
        
        
        
        
        
        
        
        
          | Metal    ring | Colour ring | Date | Species | Age | Clutch size | Location | Nest code | Ringer | Head+Bill | Mass | Wing | Parents |  
          | NLA 5633713 | y-B:E | 16-5-2025 | Caspian Gull | pullus | 1 egg | the Netherlands, De Kreupel - eiland Q. | Q56 | Leon Kelder | 49,2 | 65,0 |  |  |  below: Caspian Gull cachinnans  B:E 1CY,  August 01 2025, Stellendam, the Netherlnads. Picture: Theo Muusse.
 
 below: Caspian Gull cachinnans  B:E 1CY,  July 13 2025, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.
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