Larus cachinnans in the Netherlands

(last update: August 16, 2020)

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

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Cachinnans - nest Lelystad 207

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 207 positioned on old Spoonbill nest on dam 2, just 7 meters east of blue sign VHF20.
  • ID certain in 2022: both cachinnans.
location April 19th, 2022: nest location. April 29th, 2022: 2 eggs. April 29th, 2022: 1 egg hatching.
 
partner 1 April 29th, 2022: partner 1 is cachinnans. April 29th, 2022: partner 1 is cachinnans. April 29th, 2022: partner 1 is cachinnans.
 
partner 2 April 29th, 2022: partner 2 is cachinnans. April 19th, 2022: partner 2 is cachinnans. April 29th, 2022: partner 2 is cachinnans.
 
pullus May 9th, 2022: pullus r-C.K.    
     

Visits and data.

date:              
12-04-2022 2 adults near nest.  
               
  egg no: width (mm): length (mm): volume (cm3):       
15-04-2022 A 48 69 -- 90 - tip bottom 3 eggs  
  B 51 69,2   90 - tip bottom  
  C 52,6 73,1 -- 90 - tip bottom  
sum nest: --
   
19-04-2022 2 adults near nest.  
   
29-04-2022 2 eggs. One egg is hatching, small hole.
   
09-05-2022 2 adults at nest. One chick located and ringed.
1 pullus.    
NLA 5625061 r-C.K