| Coordinator: Albert de Jong
 Merijn Loeve
 Roland-Jan Buijs
 Thijs Horst
 Leon Kelder
 Mars Muusse
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 | Lesser Black-backed Gull graellsii  2.= 1CY, May 26 2022, De Kreupel, the Netherlands.
        
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            Please send in your observations of colour ringed birds to: ring@buijsecoconsult.nl |  Tibia R-2= and metal 5.623.538, ringed as pullus Larus fuscus on 26-5-2022 at IJsselmeer (De Kreupel), Noord-Holland, NL 5247.00 N 513.00 E.      Ringer: Leon Kelder. Recoveries:05-08-2022 Lelystad (Oostvaardersdijk), Flevoland, NL 5.228,00 N 519,00 E colourring read Thijs Horst
 01-10-2022 Dungeness (Strand), Kent, ENGELAND 5.054,00 N 58,00 E colourring read Martin Casemore
 05-05-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
 10-06-2025 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
 24-06-2025 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
 08-07-2025 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
 26-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Thijs Horst
 Bird from De Kreupel, nest M16 on island M. Data for this nest: 
        
      
      
      
      
      
        | Date: | Egg code | Height (mm) | Width (mm) | Comments | Metal NLA | Colour ring | Wing (mm) | Head+ bill (mm) | Mass (gr) | Swab no |  
        |  |  |  |  |  |  |  |  |  |  |  |  
        | 29-4-2022 |  |  |  | 2 eggs |  |  |  |  |  |  |  
        |  |  |  |  |  |  |  |  |  |  |  |  
        | 13-5-2022 |  |  |  | 3 eggs |  |  |  |  |  |  |  
        |  |  |  |  |  |  |  |  |  |  |  |  
        | 26-5-2022 |  |  |  | 2 pulli, 1 ei | 5623538 | Red 2.= |  | 48.3 | 61 |  |  
        |  |  |  |  |  | 5623595 | Red 3.B |  | 47.5 | 61 |  |  
        |  |  |  |  |  |  |  |  |  |  |  |  
        | 03-6-2022 |  |  |  | 1 cold egg |  |  |  |  |  |  |  
        |  |  |  |  |  |  |  |  |  |  |  |  
        | 23-6-2022 |  |  |  | Lesser Black-backed | 5623538(95?) | Red 3.B | 280 | 106.5 | 768 | 1275 |  
        |  |  |  |  | Lesser Black-backed | 5623538 | Red 2.= | 268.5 | 108.2 | 904 | 1274 |  Previously, colour ring r-2.= was used in nest M14, but that chick died. Data for this nest: 
      
      
      
      
      
      
        | Date: | Egg code | Height (mm) | Width (mm) | Comments | Metal NLA | Colour ring | Wing (mm) | Head+ bill (mm) | Mass (gr) |  
        |  |  |  |  |  |  |  |  |  |  |  
        | 29-4-2022 |  |  |  | 3 eggs |  |  |  |  |  |  
        |  |  |  |  |  |  |  |  |  |  |  
        | 20-5-2022 |  |  |  | 3 pulli in nest | 5623563 | Red 2.= |  | 63.1 | 175 |  
        |  |  |  |  |  | 5623564 | Red 2.+ |  | 62.2 | 155 |  
        |  |  |  |  |  | 5623565 | Red 3.A |  | 56.6 | 124 |    |