Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans T|7 1CY, 2025, the Netherlands. Picture: Arne Verdonk, Thijs Horst & Mars Muusse.
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Tibia G-T|7 and metal NLA 5.641.863, 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 g-N|V.
Father: adult Caspian Gull.
Nest: g-N|V (167). In 2025, G-T|7 & G-T|8 fledged, and one dead chick. Fledging rate for this nest 2025 = 2,0.
Recoveries:
25-10-2025 Almere (Dashorstdijk), Flevoland, NL 5.225,00 N 512,00 E colourring read Arne Verdonk
Visits and data 2025 nest g-N|V (167).
| 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-N|V (167) | cach | cach | 74,3 | 52,7 | 73 | 53,4 | 72,3 | 53 | 3 | ||||
| dam: | dam 1 blocks | ||||||||||||
| location: | Behind PU60-2024, same location as 2024. Code sprayed on block again.
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| parents: | same as 2024. This season trapped the female, now g-N|V. | ||||||||||||
| ringed: | |||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale |
| 01-05-2025 | g-N|V | 5641024 | 167 | PONT | F | >4CY | 452 | 970 | 131,3 | 57,8 | 69,2 | 17,2 | 7 |
| 25-05-2025 | g-T|7 | 5641863 | 167 | PONT | pullus | 960 | ringed pullus | ||||||
| 25-05-2025 | g-T|8 | 5641864 | 167 | PONT | pullus | 948 | ringed pullus | ||||||
| 09-06-2025 | G-T|7 | 5641863 | PONT | pullus | 1026 | CONTROL | |||||||
| 09-06-2025 | G-T|8 | 5641864 | PONT | pullus | 1026 | CONTROL | |||||||
| OBSERVATIONS: | |||||||||||||
| 23-04-2025 | eggs | 3 eggs, measured
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| 28-04-2025 | eggs | 3 eggs | |||||||||||
| 01-05-2025 | eggs | 3 eggs, 2x hatching
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| adult | trapped adult with Chinaloop
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| 08-05-2025 | adult | unringed partner present
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| 13-05-2025 | chicks | 1x dead chick, others not found
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| food | 2x duckling on nest
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| 25-05-2025 | chicks | 2 chicks ringed | |||||||||||
| 09-06-2025 | chicks | g-T|7 and T|8 found and measured, both fledged.
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below: Caspian Gull cachinnans T|7 1CY, October 25 2025, Almere, the Netherlands. Picture: Arne Verdonk.
below: Caspian Gull cachinnans T|7 1CY, June 09 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
| date | darvic | metal | nest | species | sexe | age | wing | mass | head+ bill | bill | gonys | barcode | comments |
| 25-05-2025 | G-T|7 | .5641863 | 167 | PONT | pullus | 960 | Ringed pullus | ||||||
| 09-06-2025 | G-T|7 | .5641863 | 167 | PONT | pullus | 1026 |
below: Caspian Gull cachinnans T|7 1CY, May 25 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
| date | darvic | metal | nest | species | sexe | age | wing | mass | head+ bill | bill | gonys | barcode | comments |
| 25-05-2025 | G-T|7 | .5641863 | 167 | PONT | pullus | 960 | Ringed pullus | ||||||
| 09-06-2025 | G-T|7 | .5641863 | 167 | PONT | pullus | 1026 |
