Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans T|5 1CY, 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
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Tibia G-T|5 and metal NLA 5.641.861, ringed as pullus Larus cachinnans on May 25 2025 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team (Mars Muusse / Thijs Horst / Fred Cottaar).
Mother: adult Caspian Gull r-7N.
Father: 7CY Caspian Gull (hybrid) n-F|N.
Nest: n-F|N & r-7N - 2025.
In 2025: g-T|5, g-T|6 & g-R|Y fledged. Fledging rate for this nest 2025 = 3,0.
Recoveries:
30-06-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
09-07-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
11-07-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
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:
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# eggs | |
| n-F|N & r-7N | cach n-F|N | cach r-7N | 75,1 | 49,8 | 74,7 | 50,2 | 68,3 | 48,4 | 3 | |||||
| dam: | dam 1 west
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| location: | was nest n-F|N in 2022-2024, East of Blackberry.
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| parents: | same as 2024
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| ringed: | ||||||||||||||
| date: | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale | |
| 25-05-2025 | g-T|5 | 5641861 | n-F|N & r-7N | PONT | pullus | 592 | ringed pullus
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| 25-05-2025 | g-T|6 | 5641862 | n-F|N & r-7N | PONT | pullus | 642 | ringed pullus
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| 31-05-2025 | g-R|Y | 5641920 | n-F|N & r-7N | PONT | pullus | 758 | 99 | ringed pullus
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OBSERVATIONS:
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| 16-03-2025 | nest | |||||||||||||
| 20-03 | nest | both partners present near nest location
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| 25-03 | nest | n-F|N present at nest location
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| 01-04 | nest | both partners present near nest location
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| 04-04 | nest | both partners present near nest location
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| 21-04 | eggs | 3x eggs measured,
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| 23-04 | nest | both partners present near nest location
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| 28-04 | eggs | 3 eggs | ||||||||||||
| 01-05 | eggs | 3 eggs | ||||||||||||
| 25-05 | nest | 2 chicks ringed, 3rd ran away into water.
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| 31-05 | chicks | 3rd chick ringed, other 2 also present
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below: Caspian Gull cachinnans T|5 1CY, July 11 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans T|5 1CY, July 09 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans T|5 1CY, June 30 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
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| date | darvic | metal | nest | species | sexe | age | wing | mass | head+ bill | bill | gonys | barcode | comments |
| 25-5-2025 | G-T|5 | .5641861 | n-F|N & r-7N | PONT | pullus | 592 | Ringed pullus |