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

 

Caspian Gull cachinnans 8.A 1CY, May - September 2023, Spain & the Netherlands. Picture: Thijs Horst, Mars Muusse, Gorka Valdés.

Tibia ring R-8|A and metal NLA 5.556.482, ringed as pullus Larus cachinnans on May 11 2023 in nest 131 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team.

Recoveries:
03-09-2023 Bay of Biscay (Offshore), Bizkaia, SPANJE 4.334,00 N 428,00 W colourring read Gorka Valdés

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?
cach x ? 131-2023 69 47,1 77,07 68,5 49,4 84,17 67,4 46,7 74,01 235,25 same as 2022?
ring pulli: laying A egg: hatch A egg
 
catch: date: metal: darvic: mass: wing: head+bill:
pullus 11-5-2023 5556480 r-8M   nest with 3 chicks, between micha-nest and nest 'branch with 2 stripes'. Halfway blocks, on top of dam.
pullus 11-5-2023 5556482 r-8A
pullus 11-5-2023 5556481 r-8B
pullus 18-6-2023 r-8M  
pullus 18-6-2023 r-8B together with r-8A, dam 1 blocks east (branch with 2 stripes after all?)
pullus 18-6-2023 r-8A together with r-8B, dam 1 blocks east (branch with 2 stripes after all?)
 
131-2023
dam: dam 1 blokken
location: is nest 131-2022? 8 m east of PU60. 
breeders: cach x ?
OBSERVATIONS:
26-4-2023 eggs: 3x egg, measured. No water test.
11-5-2023 pullus: 3 chicks ringed here: r-8A, r-8B & r-8M. Uncertainty about adults, about nest, and uncertainty about ID.
27-5-2023 nest: The branch with 2 stripes taken away, and placed vertically at (new nest) 26.
18-6-2023 pullus: r-8M, r-8A & r-8B present together. With adult cachinnans parent.
25-6-2023 pullus: r-8M, r-8A & r-8B present together.

below: Caspian Gull cachinnans 8.A 1CY, September 03 2023, Bay of Biscay (offshore), Spain. Picture: Gorka Valdés.

 

below: Caspian Gull cachinnans 8.A 1CY, July 08 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 8.A 1CY, June 25 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 8.A 1CY, June 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 8.A 1CY, May 11 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.