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 129

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 129 positioned on dam 1 blocks T-split, between nest 53 and nest yPU60. Control group Herring Gull nest to compare parameters.
  • ID uncertain in 2022: one adult is Herring Gull argenteus.
location April 27th, 2022: location of nest. April 27th, 2022: location of nest. April 27th, 2022: 3 eggs.
 
partner 1: May 17th, 2022: adult at nest. April 9th, 2023: g[97] at nest location. See also 132. .
   

Data for nest 129:
Estimation egg laying: A-egg = April 22 2022. Estimating hatching = May 20 2022.

27-Apr-22 3 eggs A egg 70,1 47,9 tip bottom - 40 gr
B egg 64,4 46,7 tip bottom - 20 gr
C egg 67,9 47,4 tip bottom - 30 gr
   
17-May-22 Herring Gull at nest. No close up visits.
               
02-Jun-22 Herring Gull at nest.