Larus cachinnans in the Netherlands

(last update: August 16, 2020)

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

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Lelystad 2023:
nest y-PNED
nest y-P:U60
nest y-X56A
nest y-X71A
nest y-X60J
nest y-XCHP
nest w-327:U
nest n-F|6
nest n-F|8
nest n-F|+
nest n-F|N
nest r-6.B
nest r-7.P
nest r-C.G
nest w-8Z
nest 003
nest 006
nest 013
nest 014
nest 015
nest 017

nest 017B
nest 018
nest 019
nest 021
nest 026
nest 033
nest 034
nest 035
nest 038
nest 040
nest 044
nest 046
nest 048
nest 053
nest 055
nest 060
nest 061Z
nest 062
nest 063
nest 107Z
nest 108
nest 109
nest 111
nest 112
nest 127Z
nest 131Z
nest 132 YLG
nest 135
nest 139
nest 147Z
nest 163
nest 167
nest 168
nest 204
nest 206
nest 207
nest 223
nest 227
nest 230Z
nest 231
nest 244Z
nest 245Z
nest 248
nest 251
nest 252
nest 253
nest 254
nest 255Z
nest 256Z
nest 262

Cachinnans - nest Lelystad 230

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 230 positioned on dam 2, west. 2 mtr S of lighthouse dam 2. Nest of Herrings, is part of "Herring Gull control group".
  • ID certain in 2022: both are argenteus.
  • ID certain in 2023: both are argenteus.
location April 29th, 2022: location of nest. April 29th, 2022: full clutch, 3 eggs. May 1st, 2022: 2 Herring Gulls.
 
partner 1 April 27th, 2023: adult Herring Gull. . .
     
pullus May 27th, 2023 pullus g[8|H]. . .
     

Visits and data.

nest 230Z-2022 date A egg: April 24 hatch A egg: May 22 ring chicks: May 31
     
29-04-22 3 eggs A egg 69,4 48,3 tip bottom - 30 gr 2 mtr S of lighthouse dam 2. Nest of Herrings.
B egg 67,6 47 tip bottom - 40 gr between bricks, red spot sprayed.
C egg 70,6 48 tip bottom - 30 gr
01-05-22 2 adults at nest.
17-05-22 3 eggs.
17-06-22 2 adults and (at least) 2 chicks.
21-06-22 2 adults and (at least) 2 chicks.
 
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 ? 230Z-2023 70,8 50,7 91,63 69 48,6 82,06 68 48,6 80,87 254,56 No.
ring pulli: May 25 laying A egg: April 20 hatch A egg: May 18
     
catch: date: metal: darvic: mass: wing: head+bill:
pullus 27-05-2023 5.625.257 g-8|H 211
   
230Z-2023 was Herring Gull in 2022
dam: dam 2 west
location: 2 mtr S of lighthouse. Close to nest X60J-2023
breeders: teus x ? (probably teus x teus)
OBSERVATIONS: Water test:
26-04-2023 nest: 3 eggs. Measured & water test: A 20 - tip bottom
B 20 - tip bottom
27-04-2023 adult: breeding ad Herring C 30 - tip bottom
11-05-2023 pullus: r-77 in this nest? Should be from X60J? > Yes, from y-X60J.
27-05-2023 pullus: 1x chick ringed.