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 A01 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 "A". Nest discovered late in season, and coded "A01" in 2021.
location June 4th, 2021. June 4th, 2021. .
   
pulli: June 11th, 2021: pullus r-B.7. June 11th, 2021: pullus r-B.7. .
   
. June 11th, 2021: pullus r-B.8. June 11th, 2021: pullus r-B.8. .
   

Visits and data.

Date:           Details:
             
4-6-2021         2 Caspian Gulls cachinnans at nest. Alarming.
    https://waarneming.nl/observation/216520448/
11-6-2021 Metal: Tibia: Head + Bill: Wing: Mass (gr): 2 unringed Caspian Gulls cachinnans at nest.
5556780 Red-B.7 94,5 166.5 691 https://waarneming.nl/observation/216984798/
5556781 Red-B.8 99.6 177.0 790