Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans M|5 adult, 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muuse.
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Tibia G-M|5 and metal NLA 5.641.006, ringed as breeding adult Larus cachinnans on April 25 2025 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team (Mars Muusse / Thijs Horst / Fred Cottaar).
Recoveries:
05-05-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
08-05-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
30-06-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
09-07-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
Visits and data 2025 nest g-M|5 & g-N|S (014).
| NEST code | 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|5 & g-N|S (14) | cach | cach | 72,2 | 48,7 | 70,1 | 49,7 | 68,8 | 48 | 3 | |||||
| dam: | dam 2 central
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| location: | nest 14 2020-2024
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| ouders: | new, both Caspian Gulls trapped this season and ringed. | |||||||||||||
| ringed: | ||||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale | |
| 25-04-2025 | g-M|5 | 5641006 | 14 | PONT | M | >4CY | 459 | 1249 | 143,2 | 65,6 | 73,1 | 20,4 | ||
| 01-05-2025 | g-N|S | 5641022 | 14 red rope | PONT | F | >4CY | 440 | 906 | 122,1 | 77,7 | 65,7 | 17,4 | 6 | 25B00658
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| 13-05-2025 | g-T|R | 5641090 | 14 red rope | PONT | pullus | 115 | ||||||||
| 13-05-2025 | g-T|S | 5641091 | 14 red rope | PONT | pullus | 210 | ||||||||
OBSERVATIONS:
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| 23-04-2025 | nest | 3 eggs, measured.
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| 25-04 | adult | male cachinnans trapped on nest, now g-M|5.
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| 01-05 | adult | female cachinnans trapped in nest, now g-N|S.
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| 08-05 | adult | both partners present.
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| 13-05 | chicks | 2x chicks ringed, 3rd not found.
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| food | both chicks, vomit is fish bolus. Eventually, chicks not fledged. Failed season.
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below: Caspian Gull cachinnans M|5 adult, July 09 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
G-M|5 & G-N|S.
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below: Caspian Gull cachinnans M|5 adult, June 30 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans M|5 adult, May 08 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muuse.
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below: Caspian Gull cachinnans M|5 adult, May 05 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muuse.
below: Caspian Gull cachinnans M|5 adult, April 25 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muuse.
Bird with 3rd mirror, on P8.
below: Caspian Gull cachinnans M|5 adult, April 23 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muuse.
| date | darvic | metal | nest | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | barcode | greyscale | comments |
| 25-4-2025 | G-M|5 | .5641006 | 14 | PONT | M | >4CY | 459 | 1249 | 143,2 | 65,6 | 73,1 | 20,4 | 25B00546 | Trapped by ringer. Breeder on 3 eggs. |
