Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans M|0 adult, 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
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Tibia G-M|0 and metal NLA 6.254.552, ringed as breeding adult 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
05-05-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
31-05-2025 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
30-06-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
Visits and data 2025 for nest g-M|0 (021).
| 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 | |
| g-M|0 (021) | cach | cach | 73,4 | 51,9 | 72,8 | 51,6 | 69 | 52 | 3 | |||||
| dam: | dam 1 T-split | |||||||||||||
| location: | Nest 'de oksel' nest 21 | |||||||||||||
| parents: | same as 2024, trapped Caspian Gull, now g-M|0 | |||||||||||||
| ringed: | ||||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale
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| 23-04-2025 | g-M|0 | 6254552 | nest 21 | cach | M | >4CY | 470 | 1283 | 141,2 | 65,5 | 74,1 | 20,2 | 6 | |
| 13-05-2054 | g-N|6 | 5641055 | nest 21 g-M|0 | PONT | pullus | 260 | ringed pullus | |||||||
| 13-05-2055 | g-N|7 | 5641056 | nest 21 g-M|0 | PONT | pullus | 232 | ringed pullus | |||||||
| 09-06-2025 | G-T|H | 5641934 | 21 | PONT | pullus | 842 | ringed pullus | |||||||
| 09-06-2025 | G-N|6 | 5641055 | 21 | PONT | pullus | 834 | CONTROL | |||||||
| 09-06-2025 | G-N|7 | 5641056 | 21 | PONT | pullus | 656 | CONTROL | |||||||
| OBSERVATIONS: | ||||||||||||||
| 12-04-2025 | nest | cach present. | ||||||||||||
| 23-04-2025 | eggs | 3 eggs, measured.
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| adult | trapped male g-M|0, incubating 3 eggs at nest 21.
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| 28-04 | adult | attempted to trap unringed female partner, failed. Trapped g-M|0 again.
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| 13-05 | pullus | 2x chicks ringed, 3rd not found.
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| 09-06 | pullus | 1x ringed, 2 found and measured.
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| 25-06-2025 | pullus | g-n|7 found dead. Fledging: g-N|6 & g-T|H fledged. G-N|7 found dead (ring reused at nest r-5X in July).
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G-T|H was used for nest P:U60 on May 13th, 2025. But chick found dead in colony, and ring used again, now for nest 21.
G-N|7 from nest 21, trapped and measured on June 09. Later, this chick was found dead, and ring used for nest r-5X on June 29.
below: Caspian Gull cachinnans M|0 adult, June 30 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
Together: g-N|6, g-T|H and g-M|0.
below: Caspian Gull cachinnans M|0 adult, April 25 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans M|0 adult, April 23 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
Bird with 3rd mirror, on P8.
| date | darvic | metal | nest | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | barcode | greyscale | comments |
| 23-4-2025 | G-M|0 | .6254552 | Nest 21 | PONT | M | >4CY | 470 | 1283 | 141,2 | 65,5 | 74,1 | 20,2 | 25B00543 / ACA25-9177 | 6 | Trapped by ringer. Breeder on 3 eggs. |
