| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
 Home Project InfoInternational trend
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 Future
 | Caspian Gull cachinnans  L|X 1CY, May 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 |  Data for nest D1 - 2025. 
        
        
        
        
        
        
        
        
        
        
        
        
          | Metal    ring | Colour ring | Date | Species | Age | Clutch size | Location | Nest code | Ringer | Head+Bill | Mass | Wing | Parents |  
          | NLA 5639012 | g-L|X | 2-5-2025 | Caspian Gull | pullus | 2 eggs | the Netherlands, De Kreupel -  eiland D. | D1 | Leon Kelder | 50,4 | 79,0 |  |  |  
          | NLA 5639012 | g-L|X | 9-5-2025 | Caspian Gull | pullus | 3 eggs | the Netherlands, De Kreupel - eiland D. | D1 | Leon Kelder | 70,6 | 270,0 |  |  |  
          | NLA 5639013 | g-L|Y | 2-5-2025 | Caspian Gull | pullus | 2 eggs | the Netherlands, De Kreupel - eiland D. | D1 | Leon Kelder | 50,3 | 72,0 |  |  |  
          | NLA 5639013 | g-L|Y | 9-5-2025 | Caspian Gull | pullus | 3 eggs | the Netherlands, De Kreupel - eiland D. | D1 | Leon Kelder | 69,8 | 242,0 |  |  |    |