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 037

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 037 positioned at breakwater 2, outside research quadrant. Around the corner, approx 35 meters east. Discovered late in the season.
  • ID in 2020 certain, two adults both Caspian Gull cachinnans. This is nest 46 2021.
location June 2nd, 2020: parents at nest. . .
     
partner 1 June 2nd, 2020: cachinnans. June 2nd, 2020: cachinnans. June 2nd, 2020: cachinnans.
 
partner 2 June 2nd, 2020: cachinnans. June 2nd, 2020: cachinnans. June 2nd, 2020: cachinnans.
 
pullus May 21st, 2020: pullus b[F|F].    
     

Visits and data.

date: egg no: width (mm) length (mm)  
21-05-2020 pullus     Nest empty, many shit traces and fish left-overs. Pullus found, ringed b[F|F]. Both adults overhead alarming. Both unringed.
         
02-06-2020 --   Both adults overhead alarming. Both unringed.