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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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 253

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 253 positioned on dam 2 central section: two nests at 1 mtr distance, 'behind' nest 17 (only visible from north), the other neighbour is nest 223.
  • ID certain in 2023: both parents are cachinnans, male is sub-adult (4CY).
location April 26th, 2023: nest location dam 2. April 26th, 2023: full clutch, with 3 eggs. .
   
partner 1 April 27th, 2023: 4CY male cachinnans. April 27th, 2023: 4CY male cachinnans. .
   
partner 2 April 27th, 2023: adult female cachinnans. April 27th, 2023: adult female cachinnans. .
   
pullus May 18th, 2023: pullus g[7|0]. July 15th, 2023: fledged g[7|1]. July 8th, 2023: fledged g[7|Z].
 

Data for nest 253-2023:

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:
cach x cach 253-2023 77,7 48,3 91,27 75,3 49,4 92,52 74 50,8 96,15 279,94
ring pulli: May 25 laying A egg: April 20 hatch A egg: May 18
     
catch: date: darvic: metal: mass: head+bill: wing: bill: gonys: greytone:
Pullus 18-5-2023 g-7|Z 5.556.418 115 59,4
Pullus 18-5-2023 g-7|0 5.556.419 74 52
Pullus 18-5-2023 g-7|1 5.556.420 85 54
Pullus 27-5-2023 g-7|Z 5.556.418 474
Pullus 27-5-2023 g-7|1 5.556.420 382
Pullus 18-6-2023 g-7|Z 5.556.418 1057 126,0 294
Pullus 18-6-2023 g-7|1 5.556.420 1153 113,1 281 with 2x sibling
Pullus 25-6-2023 g-7|1 5.556.420 1089 127,3 339
 
253-2023
dam: dam 2 central
location: 1 mtr W of nest 223, and 7 mtr N 17, only visible from N-side.
breeders: cach x cach
OBSERVATIONS:
26-4-2023 location: two nests at 1 mtr distance, 'behind' nest 17 (only visible from north).
nest: 3 eggs. Measured and water test: A 40 - tip bottom
B 30 - tip bottom
27-04-2023 adult: 4CY cach and adult cach C 30 - tip bottom
11-05-2023 nest: 3 eggs
18-05-2023 pulli: 3 chicks ringed
27-05-2023 pulli: 2x control.
18-06-2023 pulli: g-7|Z & g-7|1 trapped for control. 3rd chick in group, no view on code, but likely g-7|0. Fledged: 3 chicks.
25-06-2023 pulli: 2 chicks g-7|Z and g-7|1 (caught from group of 3, maybe his other 2 brothers.)