Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans hybrid R|2 1CY, 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
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Tibia G-R|2 and metal NLA 5.641.927, ringed as pullus Larus cachinnans x argentatus F1 hybrid on May 31 2025 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team (Mars Muusse / Thijs Horst / Fred Cottaar).
Mother: adult Herring Gull b/r-JA.
Father: adult Caspian Gull type g-A|F.
Nest: g-A|F & b/r-JA. In 2025, g-R|2 fledged, g-T|1 not seen after ringing. Fledging rate for this nest 2025 = 1,0.
Recoveries:
29-06-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
09-07-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
Visits and data 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: | # eggs | |
| g-A|F & b/r-JA (265) | cach type | teus | 68,7 | 49,6 | 65 | 48,5 | 64,5 | 58,8 | 3 | |||||
| dam: | dam 2 east at soos
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| location: | is g-A|F-2024: 20 meters east of XCHP. Next to Blackberries, (dam 2 soos)
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| parents: | same as 2024: male g-A|F cach type and female Herring br-JA. | |||||||||||||
| ring pulli: | ||||||||||||||
| ringed: | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale | |
| 23-04-2025 | b/r-JA | 6254551 | Nest g-A|F | ZM | F | >4CY | 424 | 980 | 123,6 | 50,9 | 66,5 | 19,2 | 6 | |
| 25-05-2025 | g-T|1 | 5641855 | g-A|F & b/r-JA | HYBRID | pullus | 237 | 72,5 | |||||||
| 31-05-2025 | g-R|2 | 5641927 | g-A|F & b/r-JA | HYBRID | pullus | 343 | ||||||||
| OBSERVATIONS: | ||||||||||||||
| 25-03-2025 | adult | g-A|F & partner at location 2024 | ||||||||||||
| 01-04 | adult | g-A|F & partner at location 2024
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| 04-04 | adult | g-A|F & partner at location 2024
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| 21-04 | eggs | 3x eggs measured
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| 23-04 | adult | trapped female HG incubating 3 eggs
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| 28-04 | nest | b/r-JA present | ||||||||||||
| 08-05 | adult | both partners present
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| 25-05 | chick | 1 chick ringed, where are other two?
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| 31-05 | chicks | 1 chick ringed, g-R|2
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below: Caspian Gull cachinnans hybrid R|2 1CY, July 09 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
With g-T|J from nest y-P:U60 in background.
below: Caspian Gull cachinnans hybrid R|2 1CY, June 29 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans hybrid R|2 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 |
| 31-5-2025 | G-R|2 | .5641927 | g-A|F & b/r-JA (dam 2 soos) | HYBRID | pullus | 343 | Ringed pullus |
