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 F.C adult, 2021-2025, the Netherlands. Picture: Albert de Jong, Roland-Jan Buijs, Thijs Horst & Mars Muusse.
Tibia R-FC and metal 6.213.012, ringed as adult male Caspian Gull Larus cachinnans on May 28 2021 at nest 43 in colony Lelystad, the Netherlands.
Recoveries:
01-05-2022 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Mars Muusse
04-05-2022 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
17-05-2022 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Mars Muusse
13-02-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 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
21-11-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read T. Horst & M. Muusse
18-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst & M. Loeve
Visits and data 2021:
| date: | |||||||||
| 28-05-2021 | Decided to put out a cage to trap a breeding adult here. Successful. Adult male cachinnans trapped today. | ||||||||
| 2 eggs in nest. | |||||||||
| egg no: | width (mm) | length (mm) | volume (cm3): | water test on May 28th: | |||||
| A egg | 74,5 | 50,4 | 95,28 | 90 - floating 2 mm | |||||
| B egg | 66,4 | 46,5 | 72,29 | 90 - floating 2 mm | |||||
| sum nest: | -- | ||||||||
| metal | tibia | mass (gr) | head + bill (mm) | wing (mm) | tarsus (mm) | bill (mm) | gonys (mm) | ||
| adult | .6213012 | r-F.C | 1332 | 135,6 | 464 | 71 | 66 | 19,3 | |
| 08-06-2021 | 2 partners at nest. male guarding at blocks. Large female at nest. 3 meters to the west is LBBG nest (also behind trunk). | ||||||||
| metal | tibia | mass (gr) | head + bill (mm) | wing (mm) | |||||
| 26-06-2021 | pullus | .5550699 | r-F.3 | 714 | 98,3 | 151 | cachinnans | ||
| pullus | .5550700 | r-F.4 | 466 | 87,2 | 110 | cachinnans | |||
below: Caspian Gull cachinnans F.C adult, November 21 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans F.C adult, July 19 2024, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans F.C adult, February 13 2023, Almere, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans F.C adult, May 28 2021, Lelystad, the Netherlands. Picture: Albert de Jong, Roland-Jan Buijs & Mars Muusse.
Bird with broad black medial band on P10 (too broad for pure cachinnans?).
