| Coordinator: Albert de Jong
 Merijn Loeve
 Roland-Jan Buijs
 Thijs Horst
 Leon Kelder
 Mars Muusse
 Home Project InfoLocation Lelystad
 Location De Kreupel
 2019 Lelystad
 2020 Lelystad
 2021 Lelystad
 Coded nests  Lelystad
 2020 De Kreupel
 2021 De Kreupel
 Coded nests  De Kreupel
 All ring codes 2020
 All ring codes 2021
 Lelystad 2021nest  y-PNED
 nest  y-PESV
 nest  y-PLDP
 nest  y-PHSV
 nest  y-P:A02
 nest  y-P:U60
 nest  r-FB
 nest  r-FC
 nest 001
 nest 003
 nest  006
 nest 011
 nest 012
 nest 013
 nest 014
 nest 015
 nest 016B
 nest 017
 nest 018
 nest  019
 nest 021
 nest 034
 nest 035
 nest 038
 nest 040
 nest 041
 nest 042
 nest 044
 nest 045
 nest 046
 nest 047
 nest 048
 nest 053
 nest 054
 nest 055
 nest 056
 nest 058
 nest 060
 nest 062
 nest 063
 nest 065
 nest 066
 nest 067
 nest 072
 |  Cachinnans - nest Lelystad  072
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).Location marked with "red spot & white circle" on large block.Nest 072 on breakwater dam 1 at north side, section with dense vegetation. 2 meters north of nest 66 ("66" marked on blocks). But position unclear.ID for nest 072 uncertain in 2021,   probably Caspian Gulls cachinnans. Limited data. No images. Visits and data. 
        
        
        
        
        
        
          | date: |  |  |  |  |  |  |  |  |  
          | 06-05-2021 | Pair of Caspian Gulls flying off from nest. 3 eggs in nest, but size not confincing. Should be checked later on. |  
          |  | egg no: | width (mm) | length (mm) | volume (cm3): | water test on April 24th: |  |  |  |  
          |  | A egg | 47,3 | 68,3 | 77,05 | 25 - tip bottom |  |  |  |  
          |  | B egg | 48,7 | 64,6 | 80,96 | 35 - tip bottom |  |  |  |  
          |  | C egg | 48,9 |  | 81,87 | 30 - tip bottom |  |  
          |  |  |  | sum nest: | 239,88 |  |  |  |  |  
          |  |  |  
          | 15-05-2021 | Uncertainty about location. Long intense search for nests 66 & 72, no eggs / no chicks, but alarming parent over head. Dense vegetation doesn't help. |  
          |  | One block marked red spot with white circle, 5 meters behind this is an empty nest. Was 66??? |  
          |  | Maybe nest 72 is nest 39-2020? |  |