| Coordinator: Albert de Jong
 Merijn Loeve
 Roland-Jan Buijs
 Thijs Horst
 Leon Kelder
 Mars Muusse
 Home Project InfoInternational trend
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 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
 |  Cachinnans - nest De Kreupel  D05  21
General remarks: 
                  Eggs: Volume measured by  Stonehouse (1964) and  Spaans & Spaans (1975), which make comparison possible with data from Texel (Camphuysen pers comm 16.04.2020).Nest on island "D". Nest coded "D05" in season 2021. 
        
          | pulli: | May 14th, 2021: pullus r[K.P]. | May 14th, 2021: pullus r[K.R]. | May 14th, 2021: pullus r[K.S]. |  
          |  |  |  |  |  Visits and data. 
        
        
        
        
        
        
        
        
        
        
        
          | Date: | details: |  |  |  |  |  |  |  
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          | 23-4-2021 | 3 eggs in nest. | egg no: | width (mm): | length (mm): | volume (cm3): |  |  |  
          |  |  | A egg | 50.0 | 72.2 |  |  |  |  
          |  |  | B egg | 50.9 | 68.9 |  |  |  |  
          |  |  | C egg | 50.4 | 69.4 |  |  |  |  
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          |  | Attempt to trap adult  at nest. Failed. |  |  |  |  |  |  |  
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          | 14-5-2021 | 3 chicks in nest. | metal: | tibia: | mass (gr): | head + bill: | tarsus: |  |  
          |  | https://waarneming.nl/observation/214662787/ | 5556722 | Red K.P | 114 | 56.7 | 31.6 |  |  
          |  |  | 5556723 | Red K.R | 166 | 61.1 | 36.1 |  |  
          |  |  | 5556724 | Red K.S | 152 | 61.0 | 36.5 |  |  
          | 20-5-2021 | Empty nest. |  |  |  |  |  |  |  
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