| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
 Home Project InfoInternational trend
 National trend
 Site characteristics
 Breeding biology
 Fecundity
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 Future
 | Caspian Gull cachinnans  V|H 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 H3 - 2025. 
        
        
        
        
        
        
        
        
        
        
        
        
          | Metal    ring | Colour ring | Date | Species | Age | Clutch size | Location | Nest code | Ringer | Head+Bill | Mass | Wing | Parents |  
          | NLA 5639106 | g-V|G | 09-5-2025 | Caspian Gull | pullus | 2 eggs | the Netherlands, De Kreupel - eiland H. | H3 | Leon Kelder | 49,9 | 64,0 |  |  |  
          | NLA 5639106 | g-V|G | 30-5-2025 | Caspian Gull | pullus | -- | the Netherlands, De Kreupel - eiland H. | H3 | Leon Kelder |  |  |  |  
          | NLA 5639107 | g-V|H | 09-5-2025 | Caspian Gull | pullus | 2 eggs | the Netherlands, De Kreupel - eiland H. | H3 | Leon Kelder | 47,7 | 64,0 |  |  |  
          | NLA 5639107 | g-V|H | 30-5-2025 | Caspian Gull | pullus | -- | the Netherlands, De Kreupel - eiland H. | H3 | Leon Kelder |  |  |  |    |