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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Breeding biology
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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 7.6 1CY-2CY, May 2023 - March 2024, the Netherlands. Picture: Thijs Horst & Mars Muusse.

Tibia ring R-76 and metal NLA 5.556.453, ringed as pullus Larus cachinnans on May 11 2023 in nest 231 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team.

Recoveries:
11-05-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
18-06-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
26-06-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
18-07-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
29-11-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
01-12-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
06-12-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Gabi Martin, Thijs Horst & Mars Muusse
01-01-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
12-01-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read T. Horst & M. Muusse
01-02-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
04-03-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Thijs Horst & Mars Muusse

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 cach 231-2023 66,7 50,5 85,65 66,5 51,9 90,19 66,1 52 89,99 265,83 No
ring pulli: laying A egg: hatch A egg
 
catch: date: metal: darvic: mass:          
Pullus 11-5-2023 5.556.451 r-7.4 very small chick
Pullus 11-5-2023 5.556.452 r-7.5 small chick
Pullus 11-5-2023 5.556.453 r-7.6 very small chick
Pullus 18-5-2023 r-74 present
Pullus 27-5-2023 5.556.452 r-75 730 wing: head+bill:      
Pullus 18-6-2023 r-74 1041 338 118,4
   
231-2023 nest 'orange football'. 
dam: dam 2 west
location: 5 mtr south of 203/204. Near waterfront
breeders: cach x cach
OBSERVATIONS:
04-04-2023 adult: 1 cach at nest location.
09-04-2023 nest: nest empty Water test:
26-04-2023 nest: 3 eggs. Measured & water test: A 90 - tip bottom
B 90 - tip bottom
27-04-2023 adult: breeding female cach C 80 - tip bottom
11-05-2023 pulli 3 chick ringed
13-05-2023 adult: 2x cach adults, 1 chick in nest, legs not visible.
18-05-2023 nest: R-74 present, other not found
18-06-2023 pulli r-74, r-75 & r-76 swimming together, only r-74 trapped & measured. Fledged: 3 chicks.
25-06-2023 pulli r-74, r-75 and r-76. All 3 chicks fledged.

below: Caspian Gull cachinnans 7.6 2CY, March 04 2024, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 7.6 2CY, February 01 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.

below: Caspian Gull cachinnans 7.6 2CY, January 12 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 7.6 1CY, December 06 2023, Almere - De Vaart, the Netherlands. Picture Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 7.6 1CY, December 01 2023, Almere - De Vaart, the Netherlands. Picture Mars Muusse.

below: Caspian Gull cachinnans 7.6 1CY, July 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 7.6 1CY, June 25 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 7.6 1CY, June 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 7.6 1CY, May 11 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.

Still with egg tooth.