Larus cachinnans in the Netherlands

(last update: August 16, 2020)

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Caspian Gull cachinnans 8.P 1CY-2CY, May 2023 - March 2024, Lelystad & Almere, the Netherlands. Picture: Thijs Horst & Mars Muusse.

Tibia ring R-8.P and metal NLA 5.556.472, ringed as pullus Larus cachinnans on May 11 2023 in nest 108 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
08-07-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
15-12-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
17-12-2023 Almere (Dashorstdijk), Flevoland, NL 5.225,00 N 512,00 E colourring read Eric Roeland
30-12-2023 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
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
15-03-2024 Oss (Vuiloverslag), Noord-Brabant, NL 5.147,00 N 532,00 E colourring read Jaap van der Linden
30-03-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Harry Kuipers & Thijs Horst
09-06-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
08-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder

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 nest 108 74 49,7 92,03 68,2 49,8 85,16 69,7 48,6 82,89 260,08 same as 2022
ring pulli: 12-mei laying A egg: 7-april hatch A egg: 5-mei
     
catch: date: metal: darvic:            
pull 11-05-2023 NLA 5.556.472 r 8.P
pull 11-05-2023 NLA 5.556.473 r 8.V
pull 11-05-2023 NLA 5.556.474 r 8.4
pull 18-06-2023 NLA 5.556.472 r-8.P
pull 18-06-2023 NLA 5.556.474 r-8.4
nest 108
dam: dam 1 T-split
location: on W-part, border bitumen - blocks. Top of dam. Coded. Exact spot as in 2022, then r[C.S] (which was at Almere dump + partner, on 23/4).
breeders: cach x cach
OBSERVATIONS:
09-04-2023 nest:  2 eggs measured. No watertest.
adult:  1x cachinnans unringed. Still not sure if r-CS is partner this season.
26-04-2023 adult: legs not visible. 
nest: 1,5 m NW is another nest, 2 eggs. LBBG? (on 27/4: yes, this is LBBG).
eggs: 3x egg, measured. No water test, ringing date known.
27-04-2023 adult: 5CY male cach. Unringed.
11-05-2023 pulli: 3 chicks ringed.
13-05-2023 adult partner 1 present.
18-06-2023 pulli: r-8P and r-84 present. Large chicks. 2x juveniles fledged.
25-06-2023 pulli: r-8P present, other ring unreadable, probably r-8.4.

below: Caspian Gull cachinnans 8.P 2CY, March 30 2024, Lelystad, the Netherlands. Picture: Thijs Horst.

below: Caspian Gull cachinnans 8.P 2CY, January 12 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst & Mars Muusse.

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

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

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

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