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 K.W 1CY-4CY, May 2021 - July 2024, the Netherlands & France. Picture: Thijs Horst, Mars Muusse, Leon Kelder & Patrick Derrien.
Red tibia ring r[K.W] and metal NLA 5.556.728, ringed as pullus Larus cachinnans on May 14 2021 at nest L05 21 in colony De Kreupel - IJsselmeer, the Netherlands (5247.00 N 513.00 E) - ringer Leon Kelder.
ID is uncertain: mother is Caspian Gull cachinnans, father is unknown.
Recoveries:
20-05-2021 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E captured by ringer Leon Kelder.
19-01-2022 Sonzay (Vuilstort), Indre-et-Loire, FRANKRIJK 4.730,00 N 28,00 E colourring read Patrick Derrien.
20-01-2022 Sonzay (Vuilstort), Indre-et-Loire, FRANKRIJK 4.730,00 N 28,00 E colourring read Patrick Derrien
30-07-2022 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
12-03-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
17-03-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
31-03-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
09-04-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
19-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst & M. Muusse
28-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst & M. Muusse
05-08-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst, M. Muusse & T. Muusse
Visits to nest in 2021:
| Date: | details: | |||||
| 23-4-2021 | 3 eggs in nest. | egg no: | width (mm): | length (mm): | volume (cm3): | |
| A egg | 50.7 | 70.0 | ||||
| B egg | 50.9 | 71.7 | ||||
| C egg | 50.3 | 74.6 | ||||
| Attempt to trap breeding adult. Adult Caspian Gull cachinnans trapped, but escaped. | ||||||
| 14-5-2021 | 3 pulli in nest. | metal: | tibia: | mass (gr): | head + bill: | tarsus: |
| Prey: Roach 3x. | NLA 5.556.728 | Red K.W | 73 | 48.0 | 27.5 | |
| https://waarneming.nl/observation/214663776/ | NLA 5.556.729 | Red K.X | 87 | 52.9 | 29.8 | |
| NLA 5.556.730 | Red K.Y | 81 | 52.5 | 30.4 | ||
| 20-5-2021 | 3 pulli in nest. | metal: | tibia: | mass (gr): | head + bill: | |
| Prey: Roach 2x. | NLA 5.556.728 | Red K.W | 204 | 62.7 | ||
| https://waarneming.nl/observation/214709851/ | NLA 5.556.729 | Red K.X | 271 | 69.0 | ||
| NLA 5.556.730 | Red K.Y | 256 | 69.0 | |||
| 28-5-2021 | Camera trap near nest: 1 unringed adult. https://waarneming.nl/observation/224226824/ | |||||
below: Caspian Gull cachinnans K.W 4CY, July 19 2024, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans K.W 3CY, April 09 2023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans K.W 3CY, March 17 2023, Almere, the Netherlands. Picture: Thijs Horst & Mars Muusse.
Probably female.
below: Caspian Gull cachinnans K.W 2CY, August 02 2022, De Kreupel - H, the Netherlands. Picture: Leon Kelder / camera trap.
below: Caspian Gull cachinnans K.W 2CY, January 19 2022, Sonzay dump, France. Picture: Patrick Derrien.
below: Caspian Gull cachinnans K.W 1CY, May 14 2021, De Kreupel - L, the Netherlands. Picture: Leon Kelder.
