| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
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   | Caspian Gull cachinnans  8|A 1CY-3CY, 2023-2025, England & the Netherlands.  Picture: Martin Casemore, Thijs Horst & Mars Muusse.
      
      Tibia ring G-8|A and metal NLA 5.625.191, ringed as pullus Larus cachinnans on May 27 2023 in nest n-F|8 at Lelystad, the Netherlands. Ringed by Merijn Loeve / Roland-Jan Buijs ringing team.       Recoveries:27-05-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
 26-06-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
 08-07-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
 15-07-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
 18-11-2023 Dungeness (Strand), Kent, ENGELAND 5.054,00 N 58,00 E colourring read Martin Casemore
 20-04-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
 08-04-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst & M. Muusse
 Visits and data for 2023 
        
        
        
        
        
          | egg sizes & volume 2023 |  |  |  |  |  |  |  |  |  |  |  
          | SPECIES | NEST | A_length | A_width | A_volume | B_length | B_width | B_volume | C_length | C_width | C_volume | TOTAL NEST: | known parents? |  
          | cach x cach | nF|8 | 72,2 | 52,2 | 99,06 | 71,1 | 49,1 | 86,30 | 71 | 51,1 | 93,35 | 278,71 | new nest |  
          |  |  |  |  |  |  |  |  |  |  |  |  |  |  
          | ring pulli: -- | laying A egg: -- | hatch A egg: -- |  |  |  |  |  |  |  |  
          |  |  |  |  |  |  |  |  |  |  |  |  |  |  
          |  |  |  |  |  |  |  |  |  |  |  |  |  |  
          | catch: | date: | metal: | darvic: | mass: | wing: | head+bill: |  |  |  |  |  |  
          | Pullus | 18-05-2023 | 5.556.417 | g-7|Y | 163 | -- | 64,3 |  |  |  |  |  |  |  
          | Pullus | 27-05-2023 | 5.556.417 | g-7|Y | 470 | -- | -- |  |  |  |  |  |  |  
          | Pullus | 27-05-2023 | 5.625.191 | g-8|A | 487 | -- | -- |  |  |  |  |  |  |  
        
        
        
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          | n-F|8 |  |  |  |  |  |  |  |  |  
          | dam: | dam 2 central. |  |  |  |  |  |  |  
          | location: | Dam 2 central, 8 mtr NW    of 17, only visible from N side. Behind red crate, close to bushes. Code    sprayed. |  
          | breeders: | cach x cach |  |  |  |  |  |  |  
          | OBSERVATIONS: |  |  |  |  |  |  |  |  
          | 27-04-2023 | adult: |  |  |  |  |  |  |  |  
          | 30-04-2023 | nest: | 3 eggs. Measured. Watertest: |  |  | A: 1 mm - floating |  
          |  | adult: | nF8 breeding. Later: unringed    partner. Both large birds. | B: 2 mm - floating |  
          | 11-05-2023 | nest: | 3 eggs hatching |  |  |  | C: 1/2 way - floating |  
          | 18-05-2023 | pulli: | 1 chick ringed, other 2    not found |  |  |  |  
          | 27-05-2023 | pulli: | 1x control, 1x new chick    ringed |  |  |  |  
          | 25-06-2023 | pulli: | g-7|Y, g-8|A and n-F|8    present |  |  |  |  below: Caspian Gull cachinnans  8|A 3CY,  April 08 2025, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse..JPG)
 
 
 below: Caspian Gull cachinnans  8|A 1CY, November 18 2023, Dungeness, England. Picture:  Martin Casemore.
 below: Caspian Gull cachinnans  8|A 1CY, July 15 2023, Lelystad colony, the Netherlands.  Picture:  Thijs Horst & Mars Muusse.
 
 below: Caspian Gull cachinnans  8|A 1CY, July 08 2023, Lelystad colony, the Netherlands.  Picture:  Thijs Horst & Mars Muusse.
 
 
 below: Caspian Gull cachinnans  8|A 1CY, June 25 2023, Lelystad colony, the Netherlands.  Picture: Thijs Horst.
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