Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans T|T 1CY, 2025, colony Lelystad, the Netherlands. Thijs Horst & Mars Muusse.
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Tibia G-T|T and metal NLA 5.641.092, ringed as pullus Larus cachinnans on May 13 2025 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team (Mars Muusse / Thijs Horst / Fred Cottaar).
Mother: adult Caspian Gull g-M|4.
Father: adult Caspian Gull.
Nest: Blue Rope (227) g-M|4. In 2025, G-R|4 fledged. Fledging rate for this nest 2025 = 1,0.
Recoveries:
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Visits and data 2025, Blue Rope (227) g-M|4.
| 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 | |
| g-M|4 (227) | cach | cach | 71 | 52 | 70,9 | 50,6 | 66,4 | 49,5 | 3 | |||||
| dam: | dam 2 west
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| location: | nest Blue Rope (227), 12 mtr E of Vuilnisbakkie, dam 2
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| parents: | same as 2024?
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| ringed: | ||||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale | |
| 25-04-2025 | g-M|4 | 5641005 | 227/blauwe touw | PONT | F | >4CY | 455 | 935 | 122,5 | 52,4 | 68,3 | 18,3 | ||
| 13-05-2025 | g-T|T | 5641091 | 227 | PONT | pullus | 105 | ||||||||
| 13-05-2025 | g-T|U | 5641091 | 227 | PONT | pullus | 81 | ||||||||
| 09-06-2025 | G-R|4 | 5641930 | 227/blauwe touw | PONT | pullus | 664 | ||||||||
OBSERVATIONS:
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| 23-04-2025 | eggs | 3 eggs, measured.
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| nest | Blue rope flat, between boulders, harder to see.
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| 25-04 | nest | g-M|4 female cach trapped on nest, incubating 3 eggs. Now g-M|4.
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| 01-05 | chicks | 2x wet chick, 1x egg
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| adult | 2x Caspian present
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| 08-05 | adult | both partners present
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| 13-05 | chicks | 2 chicks ringed, 1 egg hatching
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| 09-06 | chicks | 1 chick found and ringed. Eventually: g-R|4 fledged, while g-T|T & g-T|U not seen after ringing.
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below: Caspian Gull cachinnans T|T 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|T | .5641092 | 227 | PONT | pullus | 105 | Ringed pullus |
