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: adult Caspian Gull.
Father: 5CY Caspian Gull b-F|=.
Nest: nest b-F|=.
In 2025 g-R|0 only fledged bird. Fledging rate for this nest 2025 = 1,0.
Recoveries:
13-06-2025 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
Data for nest b-F|= (251-2025 "Ariel").
| 2025 | parent 1 | parent 2 | A_length | A_width | A_volume | B_length | B_width | B_volume |
| b-F|= (Ariel / 251) | cach | cach | 71,4 | 48,9 | 70 | 52,2 | ||
| dam: | dam 2 west
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| location: | 2 m N of blue sign, loaction of 2024, Ariel / white Buoy
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| parents: | new, now b-F|=
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| ring pulli: | ||||||||
| ringed: | darvic | metal | location / nest# | species | sexe | age | wing | mass |
| 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 | 1x cach at blue sign, above nest location
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| nest | b-F|= and unringed partner at soos dam 2
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| 20-03 | nest | b-F|= present on VHF sign dam 2
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| 25-03 | nest | b-F|= present on VHF sign dam 2
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| 01-04 | nest | b-F|= present below VHF sign around Ariel nest, but 2 more cachs present
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| 21-04 | nest | 2 eggs, measured
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| 28-04 | nest | 2 eggs | ||||||
| 08-05 | adult | b-f|= present
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| 13-05 | nest | empty nest, no chicks found
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| 31-05 | chicks | g-R|0 caught on water, with X60J alarming above. Ringed & measured. Chick appeared to belong to b-F|= | ||||||
| 09-06 | chicks | g-R|0 at water again, near nest b-F|=, CONTROL measure. | ||||||
| 14-06 | chicks | g-R|0 at water again, near nest b-F|=, CONTROL measure. | ||||||
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 |
