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 E01 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 "E". Nest coded "E01" in season 2021.
pulli: May 20th, 2021: pullus b[D|V]. June 11th, 2021: b[D|V]. June 11th, 2021: b[D|V].
 
  May 20th, 2021: pullus r[K.M] (ring recycled). June 11th, 2021: r[K.M]. June 11th, 2021: r[K.M].
 
  June 11th, 2021: r[K.M]. June 11th, 2021: r[K.M]. .
   
prey: May 20th, 2021: Roach 2x. May 20th, 2021: Roach 2x. May 20th, 2021: Eel 1x.
 

Visits and data.

Date: details:          
14-5-2021 2 pulli in nest.        
           
20-5-2021 2 pulli in nest. Ring r-K.M & metal reused here. metal: tibia: mass (gr): head + bill: .
Prey: Roach 2x; Eel 1x. NLA 5.556.756 b-D|V 135 57.5 32.4 = tarsus
https://waarneming.nl/observation/214708690/ NLA 5.556.720 r-K.M 334 76.1 60.5 = wing
         
11-6-2021 2 pulli in nest. metal: tibia: mass (gr): head + bill: wing:
  https://waarneming.nl/observation/216987573/ NLA 5.556.756 b-D|V 654 94.0 160.0
    NLA 5.556.720 r-K.M 1104 119.9 289.5
             
2-7-2021 1 chick near nest. metal: tibia: mass (gr): head + bill: wing:
  NLA 5.556.756 b-D|V 914 116.0 331.0