Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans R|0 1CY, 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
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Tibia G-R|0 and metal NLA 5.641.925, ringed as pullus Larus cachinnans on May 31 2025 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team (Mars Muusse / Thijs Horst / Fred Cottaar).
Mother: y-X60J.
Father: 6CY Caspian Gull.
Nest: X60J (253) - 2025.
In 2025 uncertainty about chicks, likely g-R|0 belongs to the nest, and fledged. Fledging rate for this nest 2025 = 1,0.
Recoveries:
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Data & visits for 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 | |
| y-X60J (253) | cach | cach | 71,7 | 50 | 68,4 | 49 | 66,6 | 49,2 | 3 | |||||
| dam: | dam 2 central
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| location: | was nest X60J-2024, 3 meters N of 17, N-side of dam,
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| parents: | same as 2024
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| ringed: | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale | |
| 31-05-2025 | G-R|0 | 5,641,925
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PONT | pullus | 780 | |||||||||
| 09-06-2025 | G-R|0 | 5,641,925
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CONTROL | PONT | pullus | 931 | ||||||||
| 14-06-2025 | G-R|0 | 5,641,925
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CONTROL | PONT | pullus | 1058 | ||||||||
OBSERVATIONS:
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| 16-03-2025 | nest | X60J present on blocks dam 1, not dam 2 (location 2024),
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| 20-03 | nest | X60J present at nest
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| 01-04 | nest | X60J present at nest
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| 21-04 | eggs | 3x eggs measured,
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| 08-05 | adult | X60J present
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| 31-05 | chicks | g-R|0 probably their chick, caught on water X60J alarming above. Ringed & measured.
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| 09-06 | chicks | g-R|0 at water again, near nest b-F|=, CONTROL measure.
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| 14-06 | chicks | g-R|0 at water again, near nest b-F|=, CONTROL measure.
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below: Caspian Gull cachinnans R|0 1CY, June 30 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
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below: Caspian Gull cachinnans R|0 1CY, June 29 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans R|0 1CY, June 09 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans R|0 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 |
| 31-05-2025 | G-R|0 | .5641925 | water bij b-F|= | PONT | pullus | 780 | Ringed pullus | ||||||
| 09-06-2025 | G-R|0 | .5641925 | PONT | pullus | 931 | ||||||||
| 14-06-2025 | G-R|0 | .5641925 | dam 2 WATER | PONT | pullus | 1058 |
