Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Albert de Jong
Leon Kelder
Roland-Jan Buijs
Thijs Horst
Merijn Loeve
Mars Muusse
Caspian Gull cachinnans C.M 1CY-4CY, 2022-2025, the Netherlands. Picture: Maarten Hotting, Mars Muusse & Thijs Horst.
Red tibia ring r[C.M] and metal NLA 5.625.063, ringed as pullus Larus cachinnans at nest 12 on May 09 2022 in colony Lelystad, the Netherlands. Ringer: Roland-Jan Buijs.
ID uncertain in 2022: one parent is unknown, other is partner 2, cachinnans (same as 2021).
Recoveries:
22-07-2022 Markermeer (Marker Wadden), Flevoland, NL 5.235,00 N 522,00 E colourring read Maarten Hotting
21-02-2023 Markermeer (Marker Wadden), Flevoland, NL 5.235,00 N 522,00 E colourring read Camilla Dreef & Maarten Hotting
09-04-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
08-04-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst & M. Muusse
Visits and data for 2022
Estimation egg laying: A-egg = April 01 2022. Estimating hatching = April 29 2022.
| date: | ||||||
| 12-04-2022 | 2 adults at nest site. | |||||
| 15-04-2022 | egg no: | width (mm) | length (mm) | volume (cm3): | water test on April 15th: | |
| A | 47,2 | 76,3 | -- | 90 - float halfway | 3 eggs. | |
| B | 52 | 75,4 | -- | 3 mm - float | ||
| C | 51,3 | 75,4 | -- | 90 - float halfway | ||
| sum nest: | -- | |||||
| 29-04-2022 | egg no: | water test on April 29th: | ||||
| A | 6 mm - float | 3 eggs. | ||||
| B | 6 mm - float | |||||
| C | 6 mm - float | |||||
| 09-05-2022 | metal | darvic | 3 pulli, 7 days old | |||
| pullus | 5.625.062 | r-C.L | ||||
| pullus | 5.625.063 | r-C.M | ||||
| pullus | 5.625.064 | r-C.N | ||||
| 17-06-2022 | 2 adults at nest site. | |||||
| 21-06-2022 | r-CL, r-CM, r-CN photographed. Healthy juveniles, all 3 flying around. | |||||
| 28-06-2022 | r-CL, r-CM, r-CN photographed. Healthy juveniles, all 3 flying around. | |||||
below: Caspian Gull cachinnans C.M 4CY, April 23 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
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below: Caspian Gull cachinnans C.M 4CY, April 08 2025, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.
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below: Caspian Gull cachinnans C.M 2CY, April 09 2023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans C.M 2CY, February 21 2023, Markerwadden, the Netherlands. Picture: Maarten Hotting.
below: Caspian Gull cachinnans C.M 1CY, June 28 2022, Lelystad, the Netherlands. Picture: Mars Muusse & Thijs Horst.
r[C.M] cachinnans from nest 12. Picture: June 28th, 2022.
Sibling r[C.L] & r[C.N] also fledged from this nest.
below: Caspian Gull cachinnans C.M 1CY, June 21 2022, Lelystad, the Netherlands. Picture: Mars Muusse & Thijs Horst.
below: Caspian Gull cachinnans C.M 1CY, May 09 2022, Lelystad, the Netherlands. Picture: Mars Muusse.
