| Coordinator: Albert de Jong
 Merijn Loeve
 Roland-Jan Buijs
 Thijs Horst
 Leon Kelder
 Mars Muusse
 Home Project InfoInternational trend
 National trend
 Site characteristics
 Breeding biology
 Fecundity
 Food resources
 Nonbreeding season
 Breeding species
 Hybrid scores
 Ring codes
 Future
 Nests at De Kreupel 2020nest  r-02P4 20
 nest y-X804 20
 nest D01 20
 nest D02 20
 nest D03 20
 nest L01 20
 nest L02 20
 nest L03 20
 nest M02 20
 Nests at De Kreupel 2021nest  r-02P4 20
 nest w-201U 21
 nest g-XLHD 21
 nest r-KA 21
 nest r-KB 21
 nest r-KC 21
 nest r-KD 21
 nest r-KE 21
 nest r-KF 21
 nest r-KH 21
 nest r-KJ 21
 nest r-KK 21
 nest A01 21
 nest C03 21
 nest C04 21
 nest C06 21
 nest D01 21
 nest D03 21
 nest D05 21
 nest D06 21
 nest D07 21
 nest D08 21
 nest E01 21
 nest H01 21
 nest L01 21
 nest L02 21
 nest L05 21
 nest L06 21
 nest L07 21
 nest M01 21
 nest M04 21
 nest M06 21
 nest Q01 21
 | Caspian Gull cachinnans 3.U 1CY, May 20 2022, De Kreupel, the Netherlands.
        
          | You can participate in this project too! 
            Please send in your observations of colour ringed birds to: ring@buijsecoconsult.nl |  Bird from De Kreupel, nest D8 on island D. 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 |  |  |  | 3 eggs |  |  |  |  |  |  |  
        |  |  |  |  |  |  |  |  |  |  |  |  
        | 13-5-2022 |  |  |  | 3 eggs |  |  |  |  |  |  |  
        |  |  |  |  |  |  |  |  |  |  |  |  
        | 20-5-2022 |  |  |  | 3 pulli in nest | 5623581 | Red 3.U |  | 64.2 | 197 |  |  
        |  |  |  |  |  | 5623582 | Red 3.V |  | 57.7 | 125 |  |  
        |  |  |  |  |  | 5623583 | Red 3.W |  | 53.2 | 92 |  |  
        |  |  |  |  |  |  |  |  |  |  |  |  
        | 17-6-2022 |  |  |  | 1 large juvenile at island H | 5623583 | Red 3.W | 246.5 | 112.8 | 973 | 1220 |  
        |  |  |  |  | 1 dead juvenile at island D | 5623582 | Red 3.V |  |  |  |  |    |