| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
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 | Caspian Gull cachinnans  L|B 1CY, July 2025, colony De Kreupel, the Netherlands.
        
          | You can participate in this project too! 
            Please send in your observations of colour ringed birds to: ring@buijsecoconsult.nl |  Tibia G-L|B and metal 5.632.594, ringed as  pullus Larus cachinnans on  May 02 2025 at IJsselmeer (De Kreupel), Noord-Holland, by ringer  Leon Kelder. Recoveries:09-05-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E captured by ringer Leon Kelder
 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
 Data for nest Q12 - 2025. 
        
        
        
        
        
        
        
        
        
        
        
        
          | Metal    ring | Colour ring | Date | Species | Age | Clutch size | Location | Nest code | Ringer | Head+Bill | Mass | Wing | Parents |  
          | NLA 5632594 | g-L|B | 02-5-2025 | Caspian Gull | pullus | 1 egg | the Netherlands, De Kreupel -  eiland Q. | Q12 | Leon Kelder | 49,8 | 75,0 |  |  |  
          | NLA 5632594 | g-L|B | 09-5-2025 | Caspian Gull | pullus | 3 eggs | the Netherlands, De Kreupel - eiland Q. | Q12 | Leon Kelder | 66,2 | 227,0 |  |  |  below: Caspian Gull cachinnans L|B 1CY, July 13 2025, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.
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