| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
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 | Herring Gull argenteus B / K4 1CY,  August 30 2025,  IJmuiden, the Netherlands. Picture: Mars Muusse.
        
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            Please send in your observations of colour ringed birds to: ring@buijsecoconsult.nl |  Tibia  B/R-K4 and metal NLA 6.254.617, ringed as  pullus Larus argentatus on June 29 2025 at  Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team (Mars Muusse / Thijs Horst / Fred Cottaar).   Recoveries:10-08-2025 IJmuiden (Strand Zuidpier), Noord-Holland, NL 5.228,00 N 434,00 E colourring read Aad Koot
 Data for this nest in 2025: 
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
          | date | darvic | metal | nest | species | sexe | age | wing | mass | head+ bill | bill | gonys | barcode | comments |  
          | 29-6-2025 | B/R-K4 | .6254617 | WATER BIJ R-FL | ZM |  | pullus |  |  |  |  |  |  | Ringed pullus |  
          |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  below: Herring Gull argenteus B / K4 1CY,  August 30 2025,  IJmuiden, the Netherlands. Picture: Mars Muusse.
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