Larus cachinnans in the Netherlands

(last update: August 16, 2020)

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

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Cachinnans - nest De Kreupel D01 21

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 on island "D". Nest coded "D01" in season 2021.
location: April 9th, 2021. April 9th, 2021: 2 eggs. .
   
partner: May 14th, 2021. . .
     

Visits and data.

Date: details:        
           
9-4-2021 2 eggs in nest. egg no: width (mm): length (mm): volume (cm3): 
  https://waarneming.nl/observation/210431285/ A egg 50.2 70.0
    B egg 49.1 72.9
   
23-4-2021 3 eggs in nest. egg no: width (mm): length (mm): volume (cm3): 
    A egg 50.2 70.6
    B egg 49.3 72.8
    C egg 48.6 68.4  
  Attempt to trap breeding adult with cage. Failed.        
           
14-5-2021 1 small chick dead in nest.        
  No trace of other pulli. 2 adults near nest.        
  https://waarneming.nl/observation/214662397/        
           
20-5-2021 Empty nest.