Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans M|Z adult, 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muuse.
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Tibia G-M|Z and metal NLA 5.641.001, ringed as breeding adult male Larus cachinnans on April 23 2025 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team (Mars Muusse / Thijs Horst / Fred Cottaar).
Recoveries:
25-04-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
01-05-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
05-05-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
08-05-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
27-09-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
Data for nest g-M|Z (060-2025).
| 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 | |
| g-M|Z nest 60 | cach | cach | 72,5 | 50,4 | 72 | 50,3 | 70 | 49,9 | 3 | |||||
| dam: | dam 1 cluster nest 60
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| location: | was temporarily nest 069-2024, with r-F7
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| parents: | new, Caspian Gull trapped this season, now g-M|Z | |||||||||||||
| ringed: | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale | |
| 23-04-2025 | g-M|Z | 5641001 | nest 60 | cach | M | >4CY | 476 | 1240 | 140,9 | 66,9 | 77,3 | 21 | 5 | |
OBSERVATIONS:
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| 4/21/2025 | eggs | 3x eggs measured,
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| nest | unringed adult cach & unringed sub-adult cach
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| 4/23/2025 | adult | trapped male g-M|Z, incubating 3 eggs at nest 60
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| 4/28/2025 | adult | attempted to trap unringed female, failed
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| eggs | 3 eggs | |||||||||||||
| 1/5/2025 | adult | trapped g-M|Z for 2nd time this season
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| food | fish | |||||||||||||
| eggs | 3x, no cracks
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| 8-5-2025 | adult | both partners present
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| 25/5/2025 | nest | 1 dead chick, 2x egg not hatched. Failed season.
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below: Caspian Gull cachinnans M|Z adult, May 08 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muuse.
below: Caspian Gull cachinnans M|Z adult, April 23 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muuse.
| date | darvic | metal | nest | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | barcode | greyscale | comments |
| 23-4-2025 | G-M|Z | .5641001 | Nest 60 | PONT | M | >4CY | 476 | 1240 | 140,9 | 66,9 | 77,3 | 21 | 25B00542 / ACA25-9176 | 5 | Trapped by ringer. Breeder on 3 eggs. |
