Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Thijs Horst
Leon Kelder
Mars Muusse
Caspian Gull cachinnans 5.4 1CY-4CY, 2022-2025, the Netherlands & France. Picture: Rémi Jugieux, Thijs Horst & Mars Muusse.
Red tibia ring r[5.4] and metal NLA 5.625.139, ringed as pullus Larus cachinnans at nest 206 / y[X56A] on May 17 2022 in colony Lelystad, the Netherlands. Ringer: Herman Bouman / Albert de Jong.
ID certain in 2022, both parents are Caspian Gull cachinnans, including y[X56A] from Germany.
Recoveries:
12-12-2024 Vert-le-Grand (Vuilstort), Essonne, FRANKRIJK 4.835,00 N 222,00 E colourring read Rémi Jugieux
25-03-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
25-04-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
13-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst, M. Muusse & N. Colpaert
Visits and data 2022.
| date: | |||||||
| 11-04-2022 | yellow ring at this location, can it be y-X56A? | ||||||
| 12-04-2022 | 2 adults near nest. | ||||||
| egg no: | width (mm): | length (mm): | volume (cm3): | ||||
| 15-04-2022 | A | 52,2 | 74,5 | -- | 20 - tip bottom | 3 eggs | |
| B | 52,7 | 74,2 | 10 - tip bottom | ||||
| sum nest: | -- | ||||||
| 19-04-2022 | 2 adults near nest. | ||||||
| egg no: | 3 eggs, 2 adults (incl y-X56A). | ||||||
| 29-04-2022 | A | float - 3 mm | |||||
| B | float - 2 mm | ||||||
| C | float - halfway | ||||||
| 09-05-2022 | 3 eggs. Hatching day for B egg. Small hole in egg. | ||||||
| metal | colour | mass | |||||
| 17-05-2022 | .5625139 | r-54 | 251 | ||||
| .5625140 | r-55 | 181 | |||||
| .5625141 | r-53 | 225 | |||||
| 02-06-2022 | adult y-X56A present on bread. | ||||||
| 17-06-2022 | r-55 flying around; parent y-X56A ferociously protect the chick. | ||||||
| 21-06-2022 | adult y-X56A present. Chicks r-53, r-54, r-55 swimming around. | ||||||
| food: we catch r-55, throws up fish food. | |||||||
| 28-06-2022 | adult y-X56A present. Chicks r-53 & r-55 photographed. | ||||||
| 12-07-2022 | Chick r-55 photographed. | ||||||
below: Caspian Gull cachinnans 5.4 4CY, July 13 2025, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.
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below: Caspian Gull cachinnans 5.4 4CY, March 25 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
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below: Caspian Gull cachinnans 5.4 3CY, December 12 2024, Essonne, France. Picture: Rémi Jugieux.
below: Caspian Gull cachinnans 5.4 1CY, June 21 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
r[5.4] cachinnans from nest 206 y[X56A]. Picture: June 21st, 2022.
Fledged. Sibling r[5.3] & r[5.5] also fledged.
below: Caspian Gull cachinnans 5.4 1CY, May 17 2022, Lelystad, the Netherlands. Picture: Mars Muusse.
