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.L 1CY-4CY, June 2021 - June 2024, the Netherlands & Portugal. Picture: Thijs Horst, Jeroen Nagtegaal, Mars Muusse, Teresa Cohen, José Nunes & Guus van Duin.
Red tibia ring r[F.L] and metal NLA 5.550.684, ringed as pullus Larus cachinnans on June 26 2021 at nest 14 in colony Lelystad, the Netherlands - ringer Jeroen Nagtegaal.
ID certain in 2020 & in 2021, both parents are the same as previous year, Caspian Gull cachinnans.
Recoveries:
14-01-2022 Foz do Rio Onda (Strand), Douro Litoral, PORTUGAL 4.116,00 N 843,00 W colourring read José Nunes
04-03-2022 Sesimbra (Haven), Estremadura, PORTUGAL 3.826,00 N 906,00 W colourring read Helena Teresa Oliveira Cohen
05-05-2022 Almere (Dashorstdijk), Flevoland, NL 5.225,00 N 512,00 E colourring read Guus van Duin
06-05-2022 Almere (De Blocq van Kuffeler), Flevoland, NL 5.225,00 N 513,00 E colourring read Eric Roeland
22-07-2022 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
06-08-2022 Lelystad (Oostvaardersdijk), Flevoland, NL 5.228,00 N 519,00 E colourring read Albert de Jong
29-11-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
05-04-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Jan Zorgdrager
25-06-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
08-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
Visits and data nest 14.
| date: | ||||||
| egg no: | width (mm) | length (mm) | volume (cm3): | water test on April 27th: | ||
| 16-04-2021 | A egg | 52,2 | 73,9 | 101,39 | 40 - tip on bottom | 3 eggs. |
| B egg | 51,2 | 73,7 | 97,28 | 40 - tip on bottom | ||
| C egg | 50,2 | 68,7 | 87,17 | 30 - tip on bottom | ||
| 26-04-2021 | Partner 1 at blocks in front of nest. Seemingly same parents as last year. | |||||
| 15-05-2021 | 3 eggs. (in retrospect: we should have checked for presence of letters on the eggs. Was this the still the same brood as on April 26th?) | |||||
| 28-05-2021 | 2 eggs + 1 chick (1 day old). What has been the breeding period for these eggs??? Was there a rapid 2nd attempt in late April??? | |||||
| Female at nest, but P10 slightly ackward for pure cachinnans? (probably wrong bird?) | ||||||
| 08-06-2021 | Male is cachinnans. | |||||
| Female appears at blocks with one chick. | ||||||
| metal | tibia | mass | head + bill | wing | ||
| 26-06-2021 | .5550684 | r-F.L | 859 | 111,7 | 264 | cachinnans |
| .5550685 | r-F.M | 948 | 112,8 | 252 | cachinnans | |
| .5550686 | r-F.N | 912 | 112,2 | 228 | cachinnans | |
below: Caspian Gull cachinnans F.L 4CY, June 25 2024, colony Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans F.L 3CY, November 29 2023, Almere, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans F.L 2CY, May 05 2022, Almere, the Netherlands. Picture: Guus van Duin.
below: Caspian Gull cachinnans F.L 2CY, March 04 2022, Sesimbra, Portugal. Picture: Helena Teresa Oliveira Cohen.
below: Caspian Gull cachinnans F.L 2CY, January 14 2022, Matosinhos, Portugal. Picture: José Nunes.
below: Caspian Gull cachinnans F.L 1CY, June 26 2021, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse.
