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 256

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: full clutch, 3 eggs in nest. April 27th, 2023: breeding Herring Gull. .
   
pullus May 27th, 2023: chick g[8|F]. June 25th, 2023: chick g[8|G]. .
   

Data for nest 256-2023:

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 ? 256-2023 69,7 50,6 89,85 69,7 48,4 82,21 66 47,2 74,03 246,10
ring pulli: May 25 laying A egg: April 20 hatch A egg: May 18
     
catch: date: metal: darvic: mass: wing: head+bill:
pullus 18-05-2023 1 chick, hatched today
pullus 27-05-2023 5.625.254 g-8|G 200 2 chicks ringed, 1x rotten egg
pullus 27-05-2023 5.625.255 g-8|F 235 2 chicks ringed, 1x rotten egg
pullus 25-06-2023 g-8|G 772 294 100,8
   
256-2023 NEW NEST
dam: dam 2 west
location: 8 mtr SE of lighthouse. Below nest X60J-2023. Code Z sprayed on block.
breeders: teus x ?
OBSERVATIONS: Water test:
26-4-2023 nest: 3 eggs. Measured & water test: A 30 - tip bottom
B 40 - tip bottom
27-04-2023 adult: breeding ad Herring C 30 - tip bottom
18-05-2023 pulli: 1x very small chick = 1 day old.
27-05-2023 pulli: g-8|G 2 chicks ringed, 1x rotten egg
27-05-2023 pulli: g-8|F
25-06-2023 pulli: g-8|G caught and meassured, fomitted zander. Together with r-78 (nest 229) and 1 unringed chick.