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 Lelystad 040

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 040 positioned at tip of T-split, near tower, and in cluster with several Spoonbill nests. Therefore limited visits.
  • In 2021: male is Caspian Gull cachinnans. Female is Herring Gull argenteus.
  • In 2022: both female and male are Caspian Gull cachinnans.
location May 6th, 2021: partners at nest. May 28th, 2021: argentatus x cachinnans pulli.
 
partner 1 May 28th, 2021: sub-adult male cachinnans. April 16th, 2021: sub-adult male cachinnans.
 

Visits and data.

date:              
06-05-2021 Still no visits this season, due to presence of many Spoonbills.
   
13-05-2021 No visit. Camilla is trapping a Spoonbill at dam 1.
   
15-05-2021 Still no visits this season, due to presence of many Spoonbills.
   
28-05-2021 The only real visit this season: 2 pulli in nest.
  metal ring plastic: head+bill:  
pullus .5559420 b-F|6 64,2 F1 hybride argentatus x cachinnans
pullus .5559421 b-F|7 66,6 F1 hybride argentatus x cachinnans
   
08-06-2021 Herring Gull at this location and several alrming Caspian Gulls in the air, probably including partner.