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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Nests at 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-6B
nest r-CG
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 154
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

 

Herring Gull argenteus hybrid? 7|4 1CY, May - July 2023, Lelystad colony, the Netherlands. Picture: Roel Oost, Thijs Horst & Mars Muusse.

Tibia ring G-7|4 and metal NLA 5.556.423, ringed as pullus Larus argentatus on May 18 2023 in nest 63 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team.

Recoveries:
05-09-2023 Den Helder (Ankerpark), Noord-Holland, NL 5.257,00 N 446,00 E colourring read Mardik Leopold
06-09-2023 Den Helder (Ankerpark), Noord-Holland, NL 5.257,00 N 446,00 E colourring read Mardik Leopold
09-09-2023 Markermeer (Marker Wadden), Flevoland, NL 5.235,00 N 522,00 E colourring read Roel Oost

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 ? 63-2023 73,7 51,3 97,66 72,5 52 98,71 70,1 50,5 90,01 286,37 same as 2022
ring pulli: May 22nd. laying A egg: April 17th. hatch A egg: May 15th.
 
catch: date: metal: darvic: mass: wing: head+bill:
Pullus 18-05-2023 5556423 G-7|4 64 48
Pullus 18-05-2023 5556424 G-7|5 105 53
Pullus 18-05-2023 5556425 G-7|6 118 55
Pullus 18-06-2023 g-7|4 1137 263 115,8 HG type
Pullus 25-06-2023 G-7|4 1109 311 121,7
G-7|5 1039 326 124,1
G-7|6 896 325 114,3
 
63-2023
dam: dam 1 west
location: Is nest 63-2021/22. From cluster 60-62-63.
breeders: teus x ?
OBSERVATIONS:
09-04-2023 nest: no eggs, nest is ready.
22-04-2023 nest:  3 eggs, water test: bottom 40 degrees, bottom 30 degrees, bottom flat.
18-05-2023 pullus 3 chicks ringed
18-06-2023 pullus 1x control: g-7|4 is Herring type, 32 days old.
25-06-2023 pullus 3x chicks fledged

below: Herring Gull argenteus hybrid? 7|4 1CY, September 09 2023, Marker Wadden, the Netherlands. Picture: Roel Oost.

No energy, could almost toch the bird.

below: Herring Gull argenteus hybrid? 7|4 1CY, September 05 2023, Den Helder, the Netherlands. Picture: Mardik Leopold.

below: Herring Gull argenteus hybrid? 7|4 1CY, July 08 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Herring Gull argenteus hybrid? 7|4 1CY, June 25 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Herring Gull argenteus hybrid? 7|4 1CY, June 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Herring Gull argenteus hybrid? 7|4 1CY, May 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.