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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International trend
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Site characteristics
Breeding biology
Fecundity
Food resources
Nonbreeding season
Breeding species
Hybrid scores
Ring codes
Future

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 7|L 1CY, May - August 2023, Lelystad & Westkapelle, the Netherlands. Picture: Thijs Horst, Theo & Mars Muusse.

Tibia ring G-7|L and metal NLA 5.556.403, ringed as pullus Larus cachinnans on May 18 2023 in nest 035 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team.

Recoveries:
31-07-2023 Cromer (Strand), Norfolk, ENGELAND 5.255,00 N 118,00 E colourring read Andy Hale
30-08-2023 Westkapelle (Vroon van Westkapelle), Zeeland, NL 5.132,00 N 326,00 E colourring read Roland-Jan Buijs

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 teus or
cach x cach (327U??)		 141-2023 75,1 53,3 107,42 73,8 51,5 98,55 71,9 50 90,50 296,48 same male as 2022
ring pulli: May 10th. laying A egg: Apr 5th. hatch A egg: May 3rd.
     
catch: date: metal: darvic: mass: wing: head+bill:
Pullus 18-5-2023 5556403 G-7|L 475 92
Pullus 18-5-2023 5556404 G-7|M 490 90
 
141-2023 (formerly 035)
dam: dam 1 east
location: on block at N-side, east of PNED. Code 141 on block. "the Caspian of nest 035 always fighting the Herring".
breeders: cach x teus or cach x cach (327U??)
OBSERVATIONS:
9-4-2023 nest: 3 eggs measured. No watertest, ring chicks in 1st session.
adult: female is teus, male is huge aggressive cachinnans
13-5-2023 adult: male cach. Female = cach w-327:U? Of is er een nest vlak achter?
18-5-2023 pulli: 2 chicks ringed, 3rd not found
27-5-2023 pulli: dense vegetation, nothing found.
25-6-2023 pulli: g-7|L present guarded by w-327:U  twice

below: Caspian Gull cachinnans 7|L 1CY, August 30 2023, Westkapelle, the Netherlands. Picture: Theo Muusse.

below: Caspian Gull cachinnans 2|L 1CY, July 31 2023, Cromer - Norfolk, England. Picture: Andy Hale.

With g-3|N (left).

below: Caspian Gull cachinnans 7|L 1CY, July 08 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 7|L 1CY, June 25 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.

below: Caspian Gull cachinnans 7|L 1CY, June 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 7|L 1CY, May 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.