| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
 Home Project InfoInternational trend
 National trend
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 Future
 | Caspian Gull cachinnans  A:T 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 P7 - 2025. 
        
        
        
        
        
        
        
        
        
        
        
        
          | Metal    ring | Colour ring | Date | Species | Age | Clutch size | Location | Nest code | Ringer | Head+Bill | Mass | Wing | Parents |  
          | NLA 5632638 | y-A:S | 16-5-2025 | Caspian Gull | pullus | 2 eggs | the Netherlands, De Kreupel - eiland P. | P7 | Leon Kelder | 58,4 | 138,0 |  |  |  
          | NLA 5632639 | y-A:T | 16-5-2025 | Caspian Gull | pullus | 2 eggs | the Netherlands, De Kreupel - eiland P. | P7 | Leon Kelder | 65,0 | 194,0 |  |  |  
          | NLA 5632639 | y-A:T | 30-5-2025 | Caspian Gull | pullus | 00 | the Netherlands, De Kreupel - eiland O. | P7 | Leon Kelder | 93,9 | 681,0 | 149,5 |  |    |