| 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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 | Caspian Gull cachinnans  E:6 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 ND - 2025. 
        
        
        
        
        
        
        
        
        
        
        
        
          | Metal    ring | Colour ring | Date | Species | Age | Clutch size | Location | Nest code | Ringer | Head+Bill | Mass | Wing | Parents |  
          | NLA 5633819 | y-E:4 | 30-5-2025 | Caspian Gull | pullus | 3 eggs | the Netherlands, De Kreupel - eiland N. | ND | Leon Kelder | 58,1 | 134,0 |  |  |  
          | NLA 5633820 | y-E:5 | 30-5-2025 | Caspian Gull | pullus | 3 eggs | the Netherlands, De Kreupel - eiland N. | ND | Leon Kelder | 63,2 | 196,0 |  |  |  
          | NLA 5633821 | y-E:6 | 30-5-2025 | Caspian Gull | pullus | 3 eggs | the Netherlands, De Kreupel - eiland N. | ND | Leon Kelder | 60,9 | 173,0 |  |  |  |