| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
 Home Project InfoInternational trend
 National trend
 Site characteristics
 Breeding biology
 Fecundity
 Food resources
 Nonbreeding season
 Breeding species
 Hybrid scores
 Ring codes
 Future
 | Caspian Gull cachinnans  D|9 1CY-2CY, 2024-2025, colony De Kreupel, the Netherlands.  Picture: Thijs Horst & Mars Muusse.
        
          | You can participate in this project too! 
            Please send in your observations of colour ringed birds to: ring@buijsecoconsult.nl |  Tibia  G-D|9 and metal NLA 5.629.193, ringed as  pullus Larus cachinnans on May 09 2024 at De Kreupel, Holland (5247.00 N 513.00 E). 
        Ringer  Leon Kelder.  Recoveries:19-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst & M. Muusse
 30-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read J. van Assema & T. Horst
 02-08-2024 Wervershoof (Vooroever), Noord-Holland, NL 5.245,00 N 507,00 E colourring read Jeroen van Assema
 05-08-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst, M. Muusse & T. Muusse
 08-08-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 09-08-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 26-07-2025 Andijk (Jachthaven), Noord-Holland, NL 5.244,00 N 510,00 E colourring read Thijs Horst
 Nest data 2024: 
  
  
  
  
  
  
  
  
  
  
  
  
  
    | Date trapped: | Metal code | ... | Tibia: | Colour: | Species: | Age: | Status | Clutch size: | Location: | Fledged: | Nest code: |  
    | 9-5-2024 | ...5629192 | 1 | D|8 | Green | 5927 | 1 | - | 3 | IJsselmeer, Enkhuizen, De    Kreupel, eiland C. | YES | C5 |  
    | 9-5-2024 | ...5629193 | 1 | D|9 | Green | 5927 | 1 | - | 3 | IJsselmeer, Enkhuizen, De    Kreupel, eiland C. | YES | C5 |  
    | 9-5-2024 | ...5629194 | 1 | D|A | Green | 5927 | 1 | - | 3 | IJsselmeer, Enkhuizen, De    Kreupel, eiland C. | YES | C5 |  below: Caspian Gull cachinnans  D|9 1CY, August 05 2024,   colony De Kreupel, the Netherlands.  Picture: Thijs Horst.Maybe a hint of argentatus-blood in this bird. 
 below: Caspian Gull cachinnans  D|9 1CY,  July 30 2024, colony De Kreupel, the Netherlands.  Picture: Thijs Horst.
 below: Caspian Gull cachinnans  D|9 1CY, July 19 2024, colony De Kreupel, the Netherlands.  Picture: Thijs Horst & Mars Muusse.
 |