Larus cachinnans in the Netherlands

(last update: August 16, 2020)

Coordinator:
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Thijs Horst
Leon Kelder
Mars Muusse

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Argenteus - nest Lelystad 255

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 255 positioned on dam 2 west section: 6 mtr east of lighthouse dam 2, visible from N side. Coded with "X". Nest of Herrings, is part of "Herring Gull control group".
  • ID certain in 2023: both parents are Herring Gulls.
location April 26th, 2023: 2 eggs in nest. May 27th, 2023: both parents are Herring Gulls. .
   
pullus June 18th, 2023: chick g[8|J]. May 27th, 2023: chick g[8|K]. May 27th, 2023: chick g[8|L].
 

Data for nest 255-2023:

egg sizes & volume 2023
SPECIES NEST A_length A_width A_volume B_length B_width B_volume C_length C_width C_volume TOTAL NEST: known parents?
teus x teus 255-2023 69,6 49,8 86,91 69,6 49,7 86,56 69,95 48,6 83,19 256,66 To check
ring pulli: May 25 laying A egg: April 20 hatch A egg: May 18
     
catch: date:          
pullus 11-05-2023 C-egg measured.
pullus 18-05-2023 eggs, still no chicks.
    metal: darvic: mass:
pullus 27-05-2023 5.625.258 g-8|K 71
pullus 27-05-2023 5.625.259 g-8|J 92 right tibia
pullus 27-05-2023 5.625.260 g-8|L 102
   
255-2023 NEW NEST
dam: dam 2 west
location: 6 mtr east of lighthouse dam 2. Visible from N side. Red + on block in front of nest.
breeders: teus x teus
OBSERVATIONS:
26-04-2023 nest: 2 eggs. Measured.
27-04-2023 adult: probably cach is one of the parents? In retrospect: no, it was from other nest.
30-04-2023 adult: teus & teus.
11-05-2023 nest: 3 eggs, measured c egg
27-05-2023 adult: Herring Gull 2x present.
pullus 3x chicks ringed and measured.
18-06-2023 pullus g-8|K & g-8|J present, at nest site. We did not enter the dam.