Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans hybrid M|U 1CY, June 2024, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
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Tibia ring G-M|U and metal NLA 5.631.025, ringed as juvenile Larus cachinnans on June 18 2024 at Lelystad, the Netherlands. Ringed by Mars Muusse (Roland-Jan Buijs ringing team).
Trapped at water, 3x chicks, close to nest r-7P, dam 1 west: g-M|S & g-M|T & g-M|U. Chicks guarding by adult male cachinnans (which is not the father).
Recoveries:
25-06-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
18-07-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
below: Caspian Gull cachinnans hybrid M|U 1CY, June 25 2024, Lelystad colony, the Netherlands. Picture: Thijs Horst.
Together: g-M|T & g-M|U.
below: Caspian Gull cachinnans hybrid M|U 1CY, June 18 2024, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
Visits and data 2024:
| 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: | |
| r-7.P & b/w-AB | cach | teus | 71,4 | 51,7 | 96,09 | 68,6 | 51 | 89,84 | 70,3 | 52,4 | 97,19 | 283,12 | |
| 2024 | # eggs | A-egg | hatch | # ringed chicks | # all chicks | # fledged chicks | comments | ||||||
| 3 | 16-4-2024 | 14-5-2024 | |||||||||||
| dam: | dam 1 south | ||||||||||||
| location: | far western nest in 2023 & 2024. | ||||||||||||
| parents? | same as 2023 | ||||||||||||
| ring pulli: | 18-May | ||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale | 26-04-2024 | b/w-AB | .5625285 | nest r-7P | teus | F | >4CY | 403 | 119,2 | 51,5 | 64,7 | 18,6 | 5 |
| 18-6-2024 | g-M|S | .5631023 | op water bij r-7P | cach x teus | 1CY | 293 | 986 | 115 | |||||
| 18-6-2024 | g-M|T | .5631024 | op water bij r-7P | cach x teus | 1CY | 287 | 1132 | 120,7 | |||||
| 18-6-2024 | g-M|U | .5631025 | op water bij r-7P | cach x teus | 1CY | 297 | 953 | 113 | |||||
| OBSERVATIONS: | |||||||||||||
| 08-03-2024 | adult: | r-7P & argenteus female. | |||||||||||
| 12-04-2024 | eggs: | empty nest, but is ready. | |||||||||||
| 21-04-2024 | eggs: | 3 eggs, measured. | |||||||||||
| 26-04-2024 | adult: | partner trapped at nest. | |||||||||||
| 14-05-2024 | eggs: |
2 eggs. | |||||||||||
| chicks: | 1x, just hatched. | ||||||||||||
| 31-05-2024 | chicks: | 3x chicks ringed, at dam near nest: g-C|R, g-C|T & g-C|U. In retrospect: thery are from neighbour LBBG nest. | |||||||||||
| 18-06-2024 | adult: | female b/w-AB present. | |||||||||||
| chicks: | 3x chicks ringed, at water near nest. Guarded by unringed male cachinnans. Reason unknown. Rings g-M|S, M|T & M|U. | ||||||||||||
