Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans hybrid T|D 1CY, 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
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Tibia G-T|D and metal NLA 5.641.066, ringed as pullus Larus cachinnans x argentatus hybrid on May 13 2025 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team (Mars Muusse / Thijs Horst / Fred Cottaar).
Mother: adult Herring Gull.
Father: adult Caspian Gull.
Nest: 026-2025. In 2025, G-T|D & G-R|R fledged, and one dead chick. Fledging rate for this nest 2025 = 2,0.
Recoveries:
09-06-2025 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
25-06-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
29-06-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
30-06-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
Visits and data 026-2025.
| 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:
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# eggs |
| 26 Blue Bucket | cach | teus | 73 | 48 | 69,6 | 49 | 68,1 | 46,6 | 3 | ||||
| dam: | dam 1 blocks
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| location: | at dam 1 - blocks, east part, nest with blue bucket
next to nest. |
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| parents: | same as 2024, Herring and Caspian.
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| ringed: | |||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | |
| 13-05-2025 | g-T|D | 5641066 | 26 | HYBRID
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pullus | 480 | |||||||
| 13-05-2025 | g-T|F | 5641067 | 26 | HYBRID
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pullus | 414 | FOUND DEAD, RING REUSED
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| 31-05-2025 | g-R|R | 5641912 | 26 | HYBRID | pullus | 989 | ringed pullus | ||||||
| 09-06-2025 | g-R|R | 5641912
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26 | HYBRID | pullus | 966 | CONTROL | ||||||
OBSERVATIONS:
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| 23-04-2025 | eggs | 3 eggs, measured.
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| 28-04-2025 | eggs | hatching. | |||||||||||
| 01-05-2025 | adult | Caspian & Herring Gull present.
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| 13-05-2025 | chicks | 2 chicks ringed, 3rd not found.
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| 31-05-2025 | chicks | 1 chick ringed, 1 found dead.
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| 09-06-2025 | chicks | g-R|R found and measured, G-T|D also present. Coclusion: g-T|D & g-R|R fledged, g-T|F found dead (ring reused).
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below: Caspian Gull cachinnans hybrid T|D 1CY, June 29 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
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below: Caspian Gull cachinnans hybrid T|D 1CY, June 25 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
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below: Caspian Gull cachinnans hybrid T|D 1CY, June 09 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans hybrid T|D 1CY, May 13 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 |
| 13-5-2025 | G-T|D | .5641066 | 26 | pont x zm | pullus | 480 | Ringed pullus |
