| Coordinator: Albert de Jong
 Merijn Loeve
 Roland-Jan Buijs
 Thijs Horst
 Leon Kelder
 Mars Muusse
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 |  Herring Gull argenteus 0.H adult,  July 13 2025, colony De Kreupel - island D, the Netherlands. Picture: Thijs Horst & Mars Muusse.
        
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            Please send in your observations of colour ringed birds to: ring@buijsecoconsult.nl |  Tibia ring r-0H and metal NLA 6.214.039, ringed as adult female Larus argentatus  on April 29 2022 at nest D7 at De Kreupel, Holland (5247.00 N 513.00 E) - ringer  Roland-Jan Buijs. Recoveries:08-07-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 26-08-2023 Medemblik (Marina), Noord-Holland, NL 5.246,00 N 507,00 E colourring read Wim de Lange
 13-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst, M. Muusse & N. Colpaert
 Data for this nest:Bird from De Kreupel, nest D7 on island D.
 
        
      
      
      
      
      
        | Date: | Egg code | Height (mm) | Width (mm) | Comments | Metal NLA | Colour ring | Wing (mm) | Head+ bill (mm) | Bill (mm) | Mass (gr) | Tarsus | Gonys | Swab no |  
        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
        | 29-4-2022 |  |  |  | 3 eggs |  |  |  |  |  |  |  |  |  |  
        |  |  |  |  | trapped adult Herring Gull | 6214039 | Red 0.H | 419 | 109.5 | 47.8 | 791 | 62.4 | 18.6 | 1073 |  
        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
        | 13-5-2022 |  |  |  | 3 eggs |  |  |  |  |  |  |  |  |  |  
        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
        | 26-5-2022 |  |  |  | 1 pullus in nest | 5623606 | Red 4.F |  | 50.7 |  | 90 |  |  |  |  
        |  |  |  |  | Caspian Gull w-201:U alarming over nest location |  |  |  |  |  |  |  |  |  |  below: Herring Gull argenteus 0.H adult,  July 13 2025, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.
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