Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans F|M 1CY-3CY, May 2021 - November 2023, the Netherlands & Belgium. Picture: Albert de Jong, Thijs Horst, Mars Muusse, Maurice Segers & Niels van Pelt.
Tibia B-F|M and metal Arnhem 5.559.385, ringed as pullus Larus cachinnans on May 28 2021 at nest 15 in colony Lelystad (Bataviahaven), Holland (5230.00 N 525.00 E).
Ringer : Roland-Jan Buijs.
ID certain, one parent is Caspian Gull cachinnans, the other Caspian Gull-type.
Recoveries:
28-12-2021 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
03-02-2022 Waalwijk (Vuiloverslag), Noord-Brabant, NL 5.142,00 N 502,00 E colourring read Niels van Pelt
04-02-2022 Duiven (Vuilverbranding), Gelderland, NL 5.158,00 N 559,00 E colourring read Maarten Hageman
06-03-2022 Neder-over-Heembeek (Vuiloverslag), Brussel, BELGIE 5.053,00 N 422,00 E colourring read Maurice Segers
03-07-2022 Almere (Dashorstdijk), Flevoland, NL 5.225,00 N 512,00 E colourring read Thijs Horst
01-12-2022 Almere (Dashorstdijk), Flevoland, NL 5.225,00 N 512,00 E colourring read Thijs Horst
01-04-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Jan Zorgdrager
07-04-2023 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
21-04-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
29-11-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
01-12-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
Visits and data nest 15.
| date: | ||||||
| 16-04-2021 | egg no: | width (mm) | length (mm) | volume (cm3): | water test on April 16th: | red flag 15 placed near nest. |
| A egg | 52,6 | 70,6 | 98,35 | 50 - tip bottom | ||
| B egg | 51 | 72 | 94,29 | 40 - tip bottom | ||
| C egg | 50,5 | 74,5 | 95,66 | 35 - tip bottom | ||
| sum nest: | 288,30 | |||||
| 24-04-2021 | 2 eggs. | 1 adult at blocks, guarding from look-out. | ||||
| 26-04-2021 | Herring Gull tolerated on block in front of nest. Probably Herring from nest 15B. | |||||
| Also, female on look-out and male leaves the nest for a short break or to check everything is okay. | ||||||
| 13-05-2021 | Female often on look-out block close to block 17, raising confusion if this is the partner of nest 17. | |||||
| 15-05-2021 | 1 egg cold, unfertile. Measurements Monika Ballmann: 73.2x50.4 (probably labeled C-egg in April) | |||||
| 2 chicks present in nest: Mass = 232 gr & Mass = 193 gr. | ||||||
| Food in nest: Roach (this is often a fishermen's by-catch from traps 200 meters from the nest). | ||||||
| 28-05-2021 | metal | tibia | mass | head + bill | 2 chicks ringed. | |
| pullus | .5559385 | b-F|M | 707 | 86,3 | ||
| pullus | .5559386 | b-F|N | 730 | 93,7 | ||
| 08-06-2021 | Both pulli swimming 100 meters from waterfront, right between dams with large bulkships approaching. Protected by 1 parent, made their way back to dam 2. | |||||
| 26-06-2021 | Nest abandoned. | |||||
below: Caspian Gull cachinnans F|M 3CY, November 29 2023, Almere, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans F|M 3CY, April 09 2023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
Bird has a certain hybrid vibe, both in the field and in these images.
below: Caspian Gull cachinnans F|M 2CY, July 03 2022, Almere, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans F|M 2CY, March 06 2022 Neder-over-Heembeek - Brussel, Belgium. Picture: Maurice Segers.
below: Caspian Gull cachinnans F|M 2CY, February 03 2022, Waalwijk, the Netherlands. Picture: Niels van Pelt.
below: Caspian Gull cachinnans F|M 1CY, May 28 2021, Lelystad, the Netherlands. Picture: Albert de Jong.
