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 C04 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 "C". Nest coded "C04" in season 2021.
pulli: May 14th, 2021: pullus p[FL]. May 14th, 2021: pullus p[FM]. .
   

Visits and data.

Date: details:          
           
23-4-2021 2 eggs in nest. egg no: width (mm): length (mm): volume (cm3): 
    A egg 52.0 71.3
    B egg 51.3 74.5
Attempt to trap adult at nest. Failed.          
   
14-5-2021 2 chicks in nest. metal: tibia: mass (gr): head + bill: tarsus:
  https://waarneming.nl/observation/214661957/ NLA 5.556.708 Pale FL 74 50.5 29.1
    NLA 5.556.709 Pale FM 78 53.4 27.7
   
20-5-2021 Empty nest.