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 hybrid 6.X 1CY-3CY, May 2022 - March 2024, Almere & Lelystad, the Netherlands. Picture: Eric Roeland, Thijs Horst & Mars Muusse.
Red tibia ring r[6.X] and metal NLA 5.625.175, ringed as pullus Larus cachinnans hybrid at nest 48 on May 30 2022 in colony Lelystad, the Netherlands. Ringer: Albert de Jong / Roland-Jan Buijs ringing team.
ID certain in 2022: one parent is adult cachinnans, other parent is adult argentatus.
Recoveries:
17-07-2022 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
03-02-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
19-10-2023 Lelystad (Oostvaardersdijk), Flevoland, NL 5.228,00 N 519,00 E colourring read Thijs Horst
12-11-2023 Almere (De Blocq van Kuffeler), Flevoland, NL 5.225,00 N 513,00 E colourring read Eric Roeland
30-12-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
12-01-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read T. Horst & M. Muusse
18-01-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read T. Horst & M. Muusse
15-02-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
16-03-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
30-03-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
13-09-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
Visits and data 2022 for nest 48:
Estimation egg laying: A-egg = April 21 2022. Estimating hatching = May 19 2022.
| 12-Apr-22 | adult on block in front of nest 48-2021. | ||||||
| 15-Apr-22 | nest empty, but ready for use. | ||||||
| 19-Apr-22 | same guarding adult as picture 12 April, same block. | ||||||
| 4-May-22 | adult cachinnans-type landed. | ||||||
| 9-May-22 | length | width | |||||
| 3 eggs | A egg | 71,1 | 48,5 | ||||
| B egg | 70,3 | 48,6 | |||||
| C egg | 68,6 | 46,9 | |||||
| 17-May-22 | 3 eggs | B & A hatching | |||||
| C egg still intact | |||||||
| metal | darvic | mass | wing | H+B | Bill | ||
| 30-May-22 | pullus | 5625174 | r-6.W | 235 | 51 | 69 | 26 |
| pullus | 5625175 | r-6.X | 338 | 65 | 77 | 30,5 | |
| 12-July-22 | r-6X photo. | ||||||
| 17-July-22 | r-6X photo. | ||||||
below: Caspian Gull cachinnans hybrid 6.X 3CY, March 30 2024, Almere, the Netherlands. Picture: Eric Roeland.
below: Caspian Gull cachinnans hybrid 6.X 3CY, February 15 2024, Almere, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans hybrid 6.X 3CY, January 12 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans hybrid 6.X 2CY, November 12 2023, Almere, the Netherlands. Picture: Eric Roeland.
below: Caspian Gull cachinnans hybrid 6.X 2CY, October 19 2023, Almere, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans hybrid 6.X 2CY, February 03 2023, Almere, the Netherlands. Picture: Eric Roeland.
below: Caspian Gull cachinnans hybrid 6.X 1CY, July 17 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans hybrid 6.X 1CY, July 12 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans hybrid 6.X 1CY, May 30 2022, Lelystad, the Netherlands. Picture: Mars Muusse.
r[6.X] cachinnans hybrid from nest 48 (15B). Picture: May 30th, 2022.
Ringed on May 30th. No observations since. Same for sibling r[6.W]. No confirmation on 3rd egg.
