Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Thijs Horst
Leon Kelder
Mars Muusse
Caspian Gull cachinnans C.S 4CY-7CY, May 2022 - March 2025, Lelystad & Almere, the Netherlands. Picture: Mars Muusse & Thijs Horst.
Red tibia ring r[C.S] and metal NLA 5.625.067, ringed as breeding sub-adult Larus cachinnans at nest 108 on May 09 2022 in colony Lelystad, the Netherlands. Ringer: Roland-Jan Buijs.
Recoveries:
27-01-2023 Oss (Vuiloverslag), Noord-Brabant, NL 5.147,00 N 532,00 E colourring read Jaap van der Linden
17-03-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
21-04-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
23-04-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
08-07-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
17-11-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
01-12-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
03-12-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
15-12-2023 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
12-01-2024 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
02-02-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
04-02-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
08-03-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
17-03-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
19-03-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
20-03-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
25-03-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
30-03-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Harry Kuipers & Thijs Horst
31-03-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
08-04-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse, Theo Muusse
23-04-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
14-05-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
29-06-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
20-09-2024 Oss (Vuiloverslag), Noord-Brabant, NL 5.147,00 N 532,00 E colourring read T. Raats & J. Nagtegaal
15-11-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
20-11-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
15-01-2025 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
30-01-2025 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read T. Horst & M. Muusse
18-02-2025 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Mars Muusse
21-02-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
16-03-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
20-03-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
01-04-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
Data for this nest in 2024
Visits and data 2024.
| NEST code | parent 1 | parent 2 | A_length | A_width | A_volume | B_length | B_width | B_volume | C_length | C_width | C_volume | TOTAL NEST: | |
| r-C.S 2024 | cach | cach | 74,6 | 50,1 | 94,28 | 72,1 | 49,8 | 90,03 | 71,1 | 50,3 | 90,57 | 274,88 | |
| # eggs | A-egg | hatch | # ringed chicks | # all chicks | # fledged chicks | comments | |||||||
| 3 | 10-4-2024 | 6-5-2024 | |||||||||||
| dam: | dam 1 T-split | ||||||||||||
| location: | Like 2023: on W-part, border bitumen - blocks. Visible from north side. Moved 2 mtr north, compared to 2023. | ||||||||||||
| parents? | R-CS is back, and with partner 2022? | ||||||||||||
| ring pulli: | 11-May | ||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale |
| 14-05-2024 | g-C|S | .5631197 | nest r-CS / 108 | PONT | 1CY | 252 | |||||||
| 14-05-2024 | g-C|A | .5631198 | nest r-CS / 108 | PONT | 1CY | 183 | |||||||
| 04-06-2024 | g-C|S | .5631197 | nest r-CS / 108 | PONT | 1CY | 235 | 610 | 103,9 | |||||
| 04-06-2024 | g-C|A | .5631198 | nest r-CS / 108 | PONT | 1CY | 221 | 778 | 105,7 | |||||
| OBSERVATIONS: | |||||||||||||
| 12-04-2024 | eggs: | 2 eggs, measured. | |||||||||||
| 21-04-2024 | eggs: | 3 eggs, measured. | |||||||||||
| nest: | orange safety ring added | ||||||||||||
| 23-04-2024 | adults: | present are r-CS and brutal male partner cachinnans with yellow legs. | |||||||||||
| 07-05-2024 | eggs: | 1x hatching. | |||||||||||
| chicks: | 2x wet chicks, not ringed. | ||||||||||||
| 14-05-2024 | chicks: | 2x ringed, 3rd chick not found. | |||||||||||
| 04-06-2024 | chick: | g-C|A & g-C|S present. measured. | |||||||||||
In 2023: not recorded as breeding bird at Lelystad.
Data for this nest in 2022
| 11-04-2022 | nest ready. Still empty. | ||||||
| 12-04-2022 | 2 birds at nest site. | ||||||
| egg no: | width (mm): | length (mm): | volume (cm3): | water test | |||
| 15-04-2022 | A | 48,1 | 70,9 | -- | -- | ||
| 27-04-2022 | A | float - 1 mm | |||||
| 27-04-2022 | B | 67,9 | 47,7 | -- | 80 - tip on bottom | ||
| sum nest: | -- | ||||||
| 04-05-2022 | 4CY female at nest. | ||||||
| 09-05-2022 | 4CY trapped at nest. Ring metal = NLA 5.625.067. | ||||||
| darvic | gonys | wing | tarsus | head+bill | bill | mass | |
| r[C.S] | 18,0 | 446 | 69,2 | 127,2 | 59,1 | 1025 gr. | |
| 17-05-2022 | metal | darvic | mass | ||||
| pullus | NLA 5.625.106 | r-5.G | 151 | ||||
| pullus | NLA 5.625.107 | r-5.H | 89 | ||||
| prey | Roach & Eel (50 cm). | ||||||
below: Caspian Gull cachinnans C.S 7CY, April 12 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
Present at nest: r-CS and unringed male partner.
below: Caspian Gull cachinnans C.S 7CY, March 16 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
Probably with unringed male partner.
below: Caspian Gull cachinnans C.S 7CY, February 18 2025, Almere - De Vaart, the Netherlands. Picture: Mars Muusse.
below: Caspian Gull cachinnans C.S 7CY, January 30 2025, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans C.S 6CY, November 20 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans C.S 6CY, November 15 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans C.S 6CY, June 29 2024, Lelystad colony, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans C.S 6CY, March 19 2024, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans C.S 6CY, March 08 2024, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans C.S 6CY, February 27 2024, Almere - De Vaart, the Netherlands. Picture: Mars Muusse.
below: Caspian Gull cachinnans C.S 6CY, January 18 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans C.S 5CY, December 01 2023, Almere - De Vaart, the Netherlands. Picture Mars Muusse.
below: Caspian Gull cachinnans C.S 5CY, July 08 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans C.S 5CY, March 17 2023, Almere, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans C.S 4CY, May 09 2022, Lelystad, the Netherlands. Picture: Mars Muusse.
