Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans R|P 1CY, 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
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Tibia G-R|P and metal NLA 5.641.911, ringed as pullus Larus cachinnans on May 31 2025 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team (Mars Muusse / Thijs Horst / Fred Cottaar).
Mother: adult Caspian Gull g-N|U.
Father: adult Caspian Gull g-M|9.
Nest: g-M|9 & g-N|U. In 2025, g-R|P fledged. Fledging rate for this nest 2025 = 1,0.
Recoveries:
09-06-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
29-06-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
Data for nest g-M|9 & g-N|U.
| 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: | # eggs | |
| g-M|9 | cach | cach | 71,2 | 49,9 | 67,1 | 48,9 | 66,5 | 48,5 | 3 | |||||
| dam: | dam 2 T | |||||||||||||
| location: | end of pier at T-split dam 2, underneath green lighthouse, new nest.
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| parents: | New. Both Caspian Gulls trapped this season, now male is g-M|9 and female is g-N|U. | |||||||||||||
| ringed: | ||||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale | |
| 28-04-2025 | g-M|9 | 6254495 | dam 2 lighthouse | PONT | M | >4CY | 463 | 1241 | 137,1 | 65,6 | 72,7 | 21 | ||
| 01-05-2025 | g-N|U | 5641023 | dam 2 lighthouse | PONT | F | 5CY | 443 | 966 | 122,5 | 55,1 | 70 | 18,2 | ||
| 31-05-2025 | g-R|P | 5641911 | g-M|9 en g-N|U | PONT | pullus | 522 | ringed pullus | |||||||
| 14-06-2025 | g-R|P | dam 2 WATER | PONT | pullus | 746 | CONTROL | ||||||||
| OBSERVATIONS: | ||||||||||||||
| 28-04-2025 | nest | 3 eggs, measured.
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| nest | male cachinans trapped on nest, now g-M|9
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| 01-05 | adult | trapped female, Male present as well
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| egg | 3x eggs | |||||||||||||
| 31-05 | chicks | trapped one chick, other 2 not found
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| 09-06 | chicks | g-R|P present and trapped, not measured
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| 14-06-2025 | chicks | g-R|P caught on water, probably only chick.
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below: Caspian Gull cachinnans R|P 1CY, June 29 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans R|P 1CY, June 09 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans R|P 1CY, May 31 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
| date | darvic | metal | nest | species | sexe | age | wing | mass | head+ bill | bill | gonys | barcode | comments |
| 31-05-2025 | G-R|P | .5641911 | g-M|9 en g-N|U | PONT | pullus | 522 | Ringed pullus | ||||||
| 14-06-2025 | G-R|P | dam 2 WATER | PONT | pullus | 746 |
