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 126Z

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, 2 meters north of 63, visible from north side. Part of "control group Herring Gulls".
  • ID uncertain in 2022: likely both adults are Herring Gull.
location April 27th, 2022: location of nest. May 4th, 2022: 3 eggs. April 27th, 2022: location of nest.
 
partners May 1st, 2022: adult near nest. May 1st, 2022: adult near nest. May 30th, 2022: two adults near nest.
   

Visits and data:
Estimation egg laying: A-egg = April 27 2022. Estimating hatching = May 25 2022.

date:              
19-04-2022 nest is empty        
               
  egg no: width (mm): length (mm): volume (cm3):  water test    
27-04-2022 A-egg 49,2 75,5   0 - tip on bottom    
               
01-05-2022 adult Herring Gull breeding at nest  
               
  egg no: width (mm): length (mm): volume (cm3):  water test    
04-05-2022 A-egg 49 75,5 --      
  B-egg 48 74,5      
  C-egg 47,4 70,3 --  
sum nest: --
04-05-2022 adult Herring Gull breeding at nest  
   
09-05-2022 3 eggs
       
17-05-2022 3 eggs      
       
22-05-2022 3 eggs - B egg with crack    
       
30-05-2022 no chicks found.