| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
 Home Project InfoInternational trend
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 | Lesser Black-backed Gull graellsii  D:P 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 |  Tibia  Y-D:P and metal Arnhem NLA 5.633.798, ringed as  pullus Larus fuscus on May 22 2025 at IJsselmeer (De Kreupel), Holland (5247.00 N 513.00 E), by ringer Leon Kelder. Recoveries:==
 Data for nest Q41 - 2025. 
        
        
        
        
        
        
        
        
        
        
        
        
          | Metal    ring | Colour ring | Date | Species | Age | Clutch size | Location | Nest code | Ringer | Head+Bill | Mass | Wing | Parents |  
          | NLA 5633796 | y-D:M | 22-5-2025 | Caspian Gull | pullus | 3 eggs | the Netherlands, De Kreupel - eiland Q. | Q41 | Leon Kelder | 54,8 | 91,0 |  |  |  
          | NLA 5633797 | y-D:N | 22-5-2025 | Caspian Gull | pullus | 3 eggs | the Netherlands, De Kreupel - eiland Q. | Q41 | Leon Kelder | 54,3 | 70,0 |  |  |  
          | NLA 5633798 | y-D:P | 22-5-2025 | Caspian Gull | pullus | 3 eggs | the Netherlands, De Kreupel - eiland Q. | Q41 | Leon Kelder | 51,8 | 68,0 |  |  |  |