| 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  D:S 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 RA - 2025. 
        
        
        
        
        
        
        
        
        
        
        
        
          | Metal    ring | Colour ring | Date | Species | Age | Clutch size | Location | Nest code | Ringer | Head+Bill | Mass | Wing | Parents |  
          | NLA 5633799 | y-D:R | 30-5-2025 | Caspian Gull | pullus | 3 eggs | the Netherlands, De Kreupel - eiland R. | RA | Leon Kelder | 67,5 | 208,0 |  |  |  
          | NLA 5633800 | y-D:S | 30-5-2025 | Caspian Gull | pullus | 3 eggs | the Netherlands, De Kreupel - eiland R. | RA | Leon Kelder | 62,9 | 174,0 |  |  |  
          | NLA 5633801 | y-D:T | 30-5-2025 | Caspian Gull | pullus | 3 eggs | the Netherlands, De Kreupel - eiland R. | RA | Leon Kelder | 57,6 | 102,0 |  |  |  |