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 1.U 1CY-3CY, October 2022 - August 2024, De Kreupel & Westkapelle, the Netherlands. Picture: Egbert Vrieling, Thijs Horst & Mars Muusse.
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Tibia ring R-1U and metal NLA Arnhem 5.623.518, ringed as pullus Arnhem on May 13 2022 at IJsselmeer (De Kreupel), Holland (5247.00 N 513.00 E) - ringer Leon Kelder.
Recoveries:
26-10-2022 Westkapelle (Zeedijk), Zeeland, NL 5.132,00 N 326,00 E colourring read Egbert Vrieling
27-03-2023 Onderdijk (Vooroever), Noord-Holland, NL 5.244,00 N 508,00 E colourring read Leon Kelder
10-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
11-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
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
Bird from De Kreupel, nest L13 on island L. Data for this nest:
| Date: | Egg code | Height (mm) | Width (mm) | Comments | Metal NLA | Colour ring | Wing (mm) | Head+ bill (mm) | Bill (mm) | Mass (gr) | Tarsus | Gonys | Swab no |
| 14-4-2022 | A-egg | 71.2 | 50.6 | 3 eggs | |||||||||
| B-egg | 74.5 | 49.4 | |||||||||||
| C-egg | 69.6 | 49.9 | |||||||||||
| 29-4-2022 | 3 eggs | ||||||||||||
| Adult trapped, Caspian Gull | 6214038 | Red 0.G | 466 | 132.2 | 62.2 | 75.6 | 19.5 | 1070 | |||||
| 13-5-2022 | 2 pulli outside nest | 5623518 | Red 1.U | 71.5 | 78.6 | 420 | |||||||
| 5623519 | Red 1.V | 66.0 | 76.5 | 400 |
below: Caspian Gull cachinnans 1.U 3CY, August 05 2024, colony De Kreupel, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans 1.U 3CY, July 28 2024, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 1.U 3CY, July 19 2024, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 1.U 1CY, October 26 2022, Westkapelle, the Netherlands. Picture: Egbert Vrieling.
Several good indicators for Caspian Gull, but head shape and head streaking reminiscent of Herring Gull.
