| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
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 | Caspian Gull cachinnans  K|Y 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 G-K|Y and metal 5.632.582, ringed as  pullus Larus cachinnans on  May 02 2025 at IJsselmeer (De Kreupel), Noord-Holland, by ringer  Leon Kelder. Recoveries:09-05-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E captured by ringer Leon Kelder
 18-07-2025 Andijk (Jachthaven), Noord-Holland, NL 5.244,00 N 510,00 E colourring read T. Horst & M. Loeve
 26-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Thijs Horst
 Data for nest Q21 - 2025.       
        
        
        
        
        
        
        
        
        
        
        
        
          | Metal    ring | Colour ring | Date | Species | Age | Clutch size | Location | Nest code | Ringer | Head+Bill | Mass | Wing | Parents |  
          | NLA 5632582 | g-K|Y | 02-5-2025 | Caspian Gull | pullus | 2 eggs | the Netherlands, De Kreupel -  eiland Q. | Q21 | Leon Kelder | 56,0 | 83,0 |  |  |  
          | NLA 5632582 | g-K|Y | 09-5-2025 | Caspian Gull | pullus | 2 eggs | the Netherlands, De Kreupel - eiland Q. | Q21 | Leon Kelder | 75,6 | 267,0 |  |  |  
          | NLA 5632583 | g-K|Z | 02-5-2025 | Caspian Gull | pullus | 2 eggs | the Netherlands, De Kreupel -     eiland Q. | Q21 | Leon Kelder | 51,3 | 77,0 |  |  |  
          | NLA 5632583 | g-K|Z | 09-5-2025 | Caspian Gull | pullus | 2 eggs | the Netherlands, De Kreupel - eiland Q. | Q21 | Leon Kelder | 70,5 | 238,0 |  |  |    |