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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Cachinnans - nest Lelystad 147Z

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 147 positioned on dam 1 western section. Nest is part of "Herring gull control group".
  • ID certain in 2023: both parents are Herring Gull. One adult trapped at nest in 2023, now r[7.S].
pullus May 27th, 2023: pullus g[8|C] ringed. June 25th, 2023: juvenile g[8|C]. .
   

Visits and data.

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 147-2023 72,3 51,5 96,55 71,8 51,2 94,77 73,8 52,5 102,42 293,74 NEW NEST
ring pulli: laying A egg: hatch A egg
 
catch: date: metal: darvic: mass: wing: head+bill: bill: gonys: greytone:
adult 03-05-2023 6.214.909 r-7.S nn 424 nn nn nn 5 male Herring Gull
pullus 27-05-2023 5.625.279 g-8|C 476
pullus 25-06-2023 5.625.279 g-8|C 1091 324 118,2
   
147-2023 NEW NEST
dam: dam 1 west
location: on tarmac. Code sprayed in red.
breeders: teus x teus
OBSERVATIONS:
22-04-2023 nest: 3 eieren gemeten en gedompeld, resp. puntbodem plat, 20*, 20*
03-05-2023 adult: Trapped male argenteus at nest: r-7.S
13-05-2023 adult: Argenteus breeding
27-05-2023 pullus: 1x chick ringed and measured.
25-06-2023 pullus: 1x chick caught, fomitted a zander (Sander lucioperca).