| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
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 | Caspian Gull cachinnans  C:X 1CY, October 02 2025, Graye-sur-Mer, france. Picture: Emmanuel Chabot.
        
          | You can participate in this project too! 
            Please send in your observations of colour ringed birds to: ring@buijsecoconsult.nl |  Tibia  Y-C:X and metal Arnhem NLA 5.633.770, ringed as  pullus Larus cachinnans on May 22 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
 26-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Thijs Horst
 02-10-2025 Graye-sur-Mer (Seulles), Calvados, FRANRIJK 4.920,01 N 28,00 W colourring read Emmanuel Chabot
 Data for nest L14 - 2025. 
        
        
        
        
        
        
        
        
        
        
        
        
          | Metal    ring | Colour ring | Date | Species | Age | Clutch size | Location | Nest code | Ringer | Head+Bill | Mass | Wing | Parents |  
          | NLA 5633770 | y-C:X | 22-5-2025 | Caspian Gull | pullus | 1 egg | the Netherlands, De Kreupel - eiland L. | L14 | Leon Kelder | 51,1 | 83,0 |  |  |  below: Caspian Gull cachinnans  C:X 1CY, October 02 2025, Graye-sur-Mer, france. Picture: Emmanuel Chabot.
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