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 7.D 1CY-3CY, May 2022 - June 2024, the Netherlands & England. Picture: Andy Deighton, Thijs Horst & Mars Muusse.
Red tibia ring r[7.D] and metal NLA 5.625.187, ringed as pullus Larus cachinnans at nest 110 on May 17 2022 in colony Lelystad, the Netherlands. Ringer: Albert de Jong - Roland-Jan Buijs ringing team.
ID uncertain, one parent is Caspian Gull cachinnans, other parent unknown (possibly sub-adult Herring Gull?).
Recoveries:
03-09-2022 Kilnsea Wetlands, East Yorkshire, ENGELAND 5.237,00 N 7,00 E colourring read Andy Deighton & Paul Collins
03-06-2023 Markermeer (Marker Wadden), Flevoland, NL 5.235,00 N 522,00 E colourring read Maarten Hotting
25-08-2023 Lelystad (Oostvaardersdijk), Flevoland, NL 5.228,00 N 519,00 E colourring read Maarten Hotting
01-04-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
12-05-2024 IJmeer (Natuureiland), Noord-Holland, NL 5.222,00 N 500,00 E colourring read Ewout Huibers
25-06-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
Visits and data 2022 for nest 53 (coded 110 in 2022):
Estimation egg laying: A-egg = April 9 2022. Estimating hatching = May 7 2022.
| length (mm) | width (mm) | volume (cm3): | water test on April 15th: | ||||
| 15-04-2022 | A egg | 67,8 | 50,3 | -- | 20 gr - tip bottom | ||
| B egg | 68,8 | 49 | -- | 20 gr - tip bottom | |||
| C egg | 69,8 | 50,9 | -- | 30 gr - tip bottom | |||
| Code "110" sprayed on block. Within 10 minutes afetr leaving, 4 (!) cachinnans at this spot. | |||||||
| length (mm) | width (mm) | volume (cm3): | water test on April 27th: | ||||
| 27-04-2022 | A egg | -- | -- | -- | 3 mm - floating | ||
| B egg | -- | -- | -- | 3 mm - floating | |||
| C egg | -- | -- | -- | 1 mm - floating | |||
| 17-05-2022 | Ringing chicks (chicks are approx 8 days old): sub-adult cachinnans attacks us. Is this parent 2? Adult cachinnans present too. | ||||||
| metal | darvic | mass | |||||
| pullus | NLA 5625112 | r-5P | 180 | ||||
| pullus | NLA 5625113 | r-5N | 219 | ||||
| metal | darvic | mass | wing | H+B | bill | ||
| 30-05-2002 | pullus | NLA 5625187 | r-7D | 734 | 175 | 97,8 | 39,9 |
| Check: really pullus from this nest? | |||||||
| One adult cachinnans is guarding near chicks = parent 1. But 3 more cachinnans present; likely nest 110 and 113 combined. | |||||||
| 21-06-2022 | r-7D and r-5P and one unringed chick (sibling?) swim near nest 109. Also stand on blocks. | ||||||
| 28-06-2022 | r-7D and r-5N picture. | ||||||
| 28-06-2022 | r-7D and r-5P picture. All 3 ringed chicks have fledged. | ||||||
below: Caspian Gull cachinnans 7.D 3CY, June 25 2024, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 7.D 1CY, September 03 2022, Kilnsea Wetlands, England. Picture: Andy Deighton.
below: Caspian Gull cachinnans 7.D 1CY, July 12 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 7.D 1CY, June 28 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
r[7.D] cachinnans from nest 110. Picture: June 28th, 2022.
Fledged. Sibling r[5.N] & r[5.P] also fledged.
below: Caspian Gull cachinnans 7.D 1CY, June 21 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
r[5.P] and r[7.D] stay together.
