| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
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 | Caspian Gull cachinnans A|Z 1CY, 2025,  Natuureiland IJburg, the Netherlands.
        
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            Please send in your observations of colour ringed birds to: ring@buijsecoconsult.nl |  Tibia  G-A|Z and metal NLA 6.254.598, ringed as  pullus Larus cachinnans on June 18 2025 at  Amsterdam, the Netherlands. Ringed by Roland-Jan Buijs ringing team (Mars Muusse / Thijs Horst / Fred Cottaar).   Recoveries:=
 Data for this nest in 2025: 
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
          | date | darvic | metal | nest | species | sexe | age | wing | mass | head+ bill | bill | gonys | barcode | comments |  
          | 18-6-2025 | G-A|Z | .6254598 | IJburg, Natuureiland | PONT |  | pullus | 316 | 1070 | 123 |  |  |  | Sibling g-A|2 |  
          |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  Tibia ring G-A|Z was used for a pullus Larus cachinnans on May 07 2024 in nest 168-2024 at Lelystad. That bird was found dead on June 29 2024 in colony Lelystad. Ring used again in 2025. |