Larus cachinnans in the Netherlands

(last update: August 16, 2020)

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

Home

Cachinnans - nest De Kreupel D06 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 "D06" in season 2021.
partner 1: May 28th, 2021: hybrid cachinnans type. May 28th, 2021: hybrid cachinnans type. .
   
  May 28th, 2021: hybrid cachinnans type. May 28th, 2021: hybrid cachinnans type. .
   
partner 2: May 28th, 2021: partners + 2 pulli. May 28th, 2021: Herring type. .
   
  May 28th, 2021: Herring type. May 28th, 2021: Herring type. .
   

Visits and data.

Date: details:        
           
23-4-2021 2 eggs in nest. egg no: width (mm): length (mm): volume (cm3): 
  A egg 50.2 74.8
B egg 49.3 72.3
Attempt to trap adult at nest. Failed.        
   
14-5-2021 3 eggs in nest.        
           
20-5-2021 3 eggs in nest, 1 egg is hatching.        
           
28-5-2021 1 dead chick (2 days old). No sign of others.        
  Camera-trap: 2 chicks at nest.        
  Camera-trap: one partner is adult Herring Gull, one partner is possible hybrid Herring x Caspian Gull. https://waarneming.nl/observation/223644428/