| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
 Home Project InfoInternational trend
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 | Caspian Gull cachinnans  D:G 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 Q37 - 2025. 
        
        
        
        
        
        
        
        
        
        
        
        
          | Metal    ring | Colour ring | Date | Species | Age | Clutch size | Location | Nest code | Ringer | Head+Bill | Mass | Wing | Parents |  
          | NLA 5633790 | y-D:F | 22-5-2025 | Caspian Gull | pullus | 2 eggs | the Netherlands, De Kreupel - eiland Q. | Q37 | Leon Kelder | 54,5 | 102,0 |  |  |  
          | NLA 5633790 | y-D:F | 21-6-2025 | Caspian Gull | pullus | -- | the Netherlands, De Kreupel - eiland Q. | Q37 | Leon Kelder | 102,3 | 744,0 | 261,5 |  |  
          | NLA 5633791 | y-D:G | 22-5-2025 | Caspian Gull | pullus | 2 eggs | the Netherlands, De Kreupel - eiland Q. | Q37 | Leon Kelder | 56,4 | 103,0 |  |  |  
          | NLA 5633791 | y-D:G | 21-6-2025 | Caspian Gull | pullus | -- | the Netherlands, De Kreupel - eiland Q. | Q37 | Leon Kelder | 110,9 | 753,0 | 252,5 |  |  
          | NLA 5633791 | y-D:G | 04-7-2025 | Caspian Gull | pullus | -- | the Netherlands, De Kreupel - eiland Q. | Q37 | Leon Kelder | 114,6 | 642,0 | 326,5 |  |  |