Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans F|8 1CY-6CY, 2020-2025, Lelystad & Almere, the Netherlands. Picture: Merijn Loeve, Thijs Horst & Eric Roeland.
Black bar tibia ring n[F|8] and metal ring NLA 5.552.919, ringed as pullus Larus cachinnans on May 21 2020 at nest 011 in colony Lelystad, the Netherlands. Ringer: Roland-Jan Buijs.
Recoveries:
06-02-2021 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
09-10-2021 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
03-03-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
09-04-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
27-04-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
30-04-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
13-05-2023 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
25-03-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
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
18-06-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
24-06-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
16-02-2025 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
01-04-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
21-04-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
13-06-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
11-07-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
Data 2020 for nest 11.
| datum: | egg no: | width (mm) | length (mm) | volume (cm3): | water test on April 27th: | |
| 15-04-2020 | A | 51,5 | 70 | 93,48 | 50 - tip on bottom | 3 eggs in nest. |
| 15-04-2020 | B | 51,2 | 74,4 | 98,20 | 55 - tip on bottom | |
| 15-04-2020 | C | 51,2 | 75,2 | 99,26 | 85 - tip on bottom | |
| sum nest: | 290,93 | |||||
| 07-05-2020 | egg | Fully grown chick died inside the egg. | ||||
| 07-05-2020 | pullus | Pullus 4 days old. | ||||
| 07-05-2020 | pullus | Pullus 4 days old. | ||||
| 21-05-2020 | pullus | Nest empty, but 2 chicks near nest and ringed. Pullus n[F|8]. | ||||
| 21-05-2020 | pullus | Nest empty, but 2 chicks near nest and ringed. Pullus n[F|9]. | ||||
| 02-06-2020 | -- | No chicks present. Both parents present. | ||||
Visits and data 2023.
| 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 | n-F|8 | 72,2 | 52,2 | 99,06 | 71,1 | 49,1 | 86,30 | 71 | 51,1 | 93,35 | 278,71 | new nest |
| ring pulli: -- | laying A egg: -- | hatch A egg: -- | ||||||||||
| catch: | date: | metal: | darvic: | mass: | wing: | head+bill: | ||||||
| Pullus | 18-05-2023 | 5.556.417 | g-7|Y | 163 | -- | 64,3 | ||||||
| Pullus | 27-05-2023 | 5.556.417 | g-7|Y | 470 | -- | -- | ||||||
| Pullus | 27-05-2023 | 5.625.191 | g-8|A | 487 | -- | -- | ||||||
| n-F|8 | ||||||||
| dam: | dam 2 central. | |||||||
| location: | Dam 2 central, 8 mtr NW of 17, only visible from N side. Behind red crate, close to bushes. Code sprayed. | |||||||
| breeders: | cach x cach | |||||||
| OBSERVATIONS: | ||||||||
| 27-04-2023 | adult: | |||||||
| 30-04-2023 | nest: | 3 eggs. Measured. Watertest: | A: 1 mm - floating | |||||
| adult: | nF8 breeding. Later: unringed partner. Both large birds. | B: 2 mm - floating | ||||||
| 11-05-2023 | nest: | 3 eggs hatching | C: 1/2 way - floating | |||||
| 18-05-2023 | pulli: | 1 chick ringed, other 2 not found | ||||||
| 27-05-2023 | pulli: | 1x control, 1x new chick ringed | ||||||
| 25-06-2023 | pulli: | g-7|Y, g-8|A and n-F|8 present | ||||||
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: | |
| n-F|8 2024 | cach | cach | 72 | 50,2 | 91,36 | 0,00 | 0,00 | 91,36 | |||||
| # eggs | A-egg | hatch | # ringed chicks | # all chicks | # fledged chicks | comments | |||||||
| 3 | 21-4-2024 | 19-5-2024 | |||||||||||
| dam: | dam 2 central | ||||||||||||
| location: | is n-F|8 - 2023, orange crate | ||||||||||||
| parents? | n-F|8 and partner 2023? | ||||||||||||
| ring pulli: | 24-May | ||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale |
| 31-05-2024 | g-C|8 | .5631132 | n-F|8 | PONT | 1CY | ||||||||
| OBSERVATIONS: | |||||||||||||
| 25-03-2024 | adult: | n-F|8 near nest site 2023. | |||||||||||
| 31-03-2024 | adult: | n-F|8 & partner near nest site 2023. | |||||||||||
| 21-04-2024 | eggs: | 1 egg, measured | |||||||||||
| 23-04-2024 | adult: | n-F|8 & partner near nest. | |||||||||||
| 26-04-2024 | eggs: | still only 1 egg. | |||||||||||
| 07-05-2024 | nest: | 1 tiny chick, not ringed. | |||||||||||
| 14-05-2024 | nest: | no chick found. | |||||||||||
| food: | 2x Round Goby & 1x Perch. | ||||||||||||
| 31-05-2024 | chicks: | 1x ringed. Is only chick. | |||||||||||
| 18-06-2024 | nest: | 2x adults present. g-C|8 dead. Failed season. | |||||||||||
Visits and data 2025.
| 2025 | parent 1 | parent 2 | A_length | A_width | A_volume | B_length | B_width | B_volume | C_length | C_width | C_volume | TOTAL NEST: | . | # eggs |
| n-F|8 | cach | cach | 72,4 | 51,6 | 72,1 | 50,7 | 71 | 52,1 | 3 | |||||
| dam: | dam 2 central, N-side | |||||||||||||
| location: | is n-F|8 - 2023-2024, orange crate
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| parents: | same as 2024
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| ringed: | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale | |
| 31-05-2025 | g-R|L | 5641902 | n-F|8 | PONT | pullus | 818 | Ringed pullus
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| 31-05-2025 | g-R|M | 5641903 | n-F|8 | PONT | pullus | 772 | Ringed pullus
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| 09-06-2025 | G-R|L | 5641902 | PONT | pullus | 905 | CONTROL | ||||||||
OBSERVATIONS:
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| 16-03-2025 | nest | n-F|8 & partner near orange crate, location 2023-2024, North side dam 2, near nest 17,
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| 21-04 | eggs | 3x eggs measured,
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| 08-05 | adult | unringed partner present
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| 31-05 | chicks | 2x chicks ringed, 1 egg unfertile
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| food | mutiple fishes in nest, and feeding stone full of fish scraps,
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| 09-06 | chicks | g-R|L caught and measured
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below: Caspian Gull cachinnans F|8 6CY, February 16 2025, Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans F|8 5CY, March 31 2024, Lelystad, the Netherlands. Picture: Mars Muusse & Thijs Horst.
Male Caspian Gull n-F|8 and female Caspian partner.
below: wingtip of n-F|8.
Below: female partner of n-F|8.
below: Caspian Gull cachinnans F|8 5CY, March 25 2024, Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans F|8 4CY, June 25 2023, Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans F|8 4CY, April 27 2023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
Breeding in Lelystad colony in 2023.
below: Caspian Gull cachinnans F|8 4CY, April 09 2023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
Breeding in Lelystad colony in 2023.
below: Caspian Gull cachinnans F|8 4CY, March 03 2023, Almere, the Netherlands. Picture: Thijs Horst.
.JPG)
below: Caspian Gull cachinnans F|8 2CY, October 09 2021, Almere, the Netherlands. Picture: Eric Roeland.
below: Caspian Gull cachinnans F|8 2CY, February 06 2021, Almere, the Netherlands. Picture: Eric Roeland.
below: Caspian Gull cachinnans F|8 1CY, May 21 2020, Lelystad, the Netherlands. Picture: Merijn Loeve.
