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 D05 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 "D05" in season 2021.
pulli: May 14th, 2021: pullus r[K.P]. May 14th, 2021: pullus r[K.R]. May 14th, 2021: pullus r[K.S].
 

Visits and data.

Date: details:            
           
23-4-2021 3 eggs in nest. egg no: width (mm): length (mm): volume (cm3): 
  A egg 50.0 72.2
B egg 50.9 68.9
C egg 50.4 69.4
           
Attempt to trap adult at nest. Failed.            
   
14-5-2021 3 chicks in nest. metal: tibia: mass (gr): head + bill: tarsus:
  https://waarneming.nl/observation/214662787/ 5556722 Red K.P 114 56.7 31.6
    5556723 Red K.R 166 61.1 36.1
    5556724 Red K.S 152 61.0 36.5
20-5-2021 Empty nest.