| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
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 | Herring Gull argenteus   C:W 1CY, May 2025, colony De Kreupel, the Netherlands.
        
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            Please send in your observations of colour ringed birds to: ring@buijsecoconsult.nl |  Tibia  Y-C:W and metal Arnhem NLA 5.633.769, ringed as  pullus Larus argentatus on May 22 2025 at IJsselmeer (De Kreupel), Holland (5247.00 N 513.00 E), by ringer Leon Kelder. Recoveries:04-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E captured by ringer Leon Kelder
 26-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Thijs Horst
 Data for nest L11 - 2025. 
        
        
        
        
        
        
        
        
        
        
        
        
          | Metal    ring | Colour ring | Date | Species | Age | Clutch size | Location | Nest code | Ringer | Head+Bill | Mass | Wing | Parents |  
          | NLA 5633769 | y-C:W | 22-5-2025 | Herring Gull | pullus | 1 egg | the Netherlands, De Kreupel - eiland L. | L11 | Leon Kelder | 52,5 | 81,0 |  |  |  
          | NLA 5633769 | y-C:W | 04-7-2025 | Herring Gull | pullus | -- | the Netherlands, De Kreupel - eiland L. | L11 | Leon Kelder | 118,2 | 1180,0 | 323,0 |  |  |