Larus cachinnans in the Netherlands

(last update: August 16, 2020)

Coordinators:
Albert de Jong
Leon Kelder
Roland-Jan Buijs
Thijs Horst
Merijn Loeve
Mars Muusse

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Cachinnans - nest Lelystad 125Z

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 123Z positioned on dam 1 south, 10 meters west of nest 63, central talud. Part of "control group Herring Gulls".
  • ID uncertain in 2022: nest likely Lesser Black-backed Gull.
location April 27th, 2022: location of nest. April 27th, 2022: 2 eggs. May 4th, 2022: 3 eggs.
 
partners May 1st, 2022: two adults near nest. May 4th, 2022. .
   

Visits and data:
Estimation egg laying: A-egg = April 24 2022. Estimating hatching = May 22 2022.

date:              
  egg no: width (mm): length (mm): volume (cm3):  water test    
27-04-2022 A-egg 47,2 71 -- 0 - tip on bottom    
  B-egg 46,5 70,7   0 - tip on bottom  
sum nest: --
   
01-05-2022 adult Lesser Black-backed Gull    
               
04-05-2022 A-egg 48,2 71,2 --      
  B-egg 46,5 70,7      
  C-egg 45,3 64,7 --  
   
09-05-2022 3 eggs
       
17-05-2022 3 eggs      
       
22-05-2022 3 eggs A & B are hatching    
             
             
       
30-05-2022 empty nest, no chicks found.