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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Caspian Gull cachinnans 7|C 1CY-3CY, May 2023 - March 2025, Lelystad & Almere, the Netherlands. Picture: Eric Roeland, Thijs Horst & Mars Muusse.

Tibia ring G-7|C and metal NLA 5.556.495, ringed as pullus Larus cachinnans on May 18 2023 in nest P:U60 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team.

Recoveries:
18-05-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
27-05-2023 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
08-07-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
25-07-2023 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
15-12-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
16-12-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
22-12-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
31-12-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
04-01-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
05-01-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
06-01-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
12-01-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read T. Horst & M. Muusse
16-01-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read T. Horst & M. Muusse
18-01-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read T. Horst & M. Muusse
19-01-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
20-01-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
01-02-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
04-02-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
29-03-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
30-03-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
01-04-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
23-12-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
03-01-2025 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read T. Horst & M. Muusse
15-01-2025 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
20-03-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst

Data 2023 for nest y-P:U60

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 PU60 76,6 51 100,32 69,2 50,3 88,15 72,1 51,3 95,54 284,01 same as 2022
ring pulli: 10-mei laying A egg: 5-apr hatch A egg: 3-mei
     
date: metal: darvic: mass: wing: head+bill:      
pullus 11-05-2023 NLA5556478 r 8.3 -- -- --
pullus 11-05-2023 NLA5556479 r 8.5 -- -- --
pullus 18-05-2023 5556495 G-7|C 550 -- 89,8
pullus 27-05-2023 5556495 G-7|C 955 -- --
   
dam: dam 1 blocks
location: location is PU60-2022. Red spot on block near nest.
breeders: cach x cach
OBSERVATIONS:
09-04-2023 adult: female PU60 & adult male cach present. Red spot renewed.
nest:  3 eggs measured. Watertest C-egg: 20 - tip bottom.
11-05-2023 pulli: 2 chicks ringed, is there a 3rd chick?
13-05-2023 adult: PU60 & male cach present.
18-05-2023 pulli: 1 chick ringed G-7|C, R-85 present.
27-05-2023 pulli: 1x control chick G-7|C.
18-06-2023 pulli: r-83, r-85, g7|C present, with 2 adults (incl PU60). Fledged: 3 juveniles.
25-06-2023 pulli: family complete, 3x chicks 2x parents. Result 2023: 3x fledged juveniles.

below: Caspian Gull cachinnans 7|C 3CY, March 21 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.

below: Caspian Gull cachinnans 7|C 3CY, January 03 2025, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.

below: Caspian Gull cachinnans 7|C 2CY, December 23 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.

below: Caspian Gull cachinnans 7|C 2CY, April 01 2024, Almere - De Vaart, the Netherlands. Picture: Eric Roeland.

below: Caspian Gull cachinnans 7|C 2CY, February 27 2024, Almere - De Vaart, the Netherlands. Picture: Mars Muusse.

below: Caspian Gull cachinnans 7|C 2CY, February 01 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.

below: Caspian Gull cachinnans 7|C 2CY, January 16 2024, Almere, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 7|C 2CY, January 12 2024, Almere, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 7|C 1CY, December 06 2023, Almere, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 7|C 1CY, July 25 2023, Almere, the Netherlands. Picture: Thijs Horst.

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

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

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

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