| 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|E 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 Q20 - 2025. 
        
        
        
        
        
        
        
        
        
        
        
        
          | Metal    ring | Colour ring | Date | Species | Age | Clutch size | Location | Nest code | Ringer | Head+Bill | Mass | Wing | Parents |  
          | NLA 5632596 | g-L|D | 02-5-2025 | Caspian Gull | pullus | 3 eggs | the Netherlands, De Kreupel -  eiland Q. | Q20 | Leon Kelder | 64,7 | 164,0 |  |  |  
          | NLA 5632597 | g-L|E | 02-5-2025 | Caspian Gull | pullus | 3 eggs | the Netherlands, De Kreupel -     eiland Q. | Q20 | Leon Kelder | 61,2 | 134,0 |  |  |  
          | NLA 5632598 | g-L|F | 02-5-2025 | Caspian Gull | pullus | 3 eggs | the Netherlands, De Kreupel -     eiland Q. | Q20 | Leon Kelder | 64,7 | 164,0 |  |  |  
          | NLA 5632598 | g-L|F | 09-5-2025 | Caspian Gull | pullus | 1 egg | the Netherlands, De Kreupel - eiland C. | C1 | Leon Kelder | 81,1 | 384,0 | 88,5 |  |  
          | NLA 5632598 | g-L|F | 16-5-2025 | Caspian Gull | pullus | -- | the Netherlands, De Kreupel - eiland Q. |  | Leon Kelder |  |  |  |    |