Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Coordinator:
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Thijs Horst
Leon Kelder
Mars Muusse
Caspian Gull cachinnans 5.T 1CY-4CY, May 2022 - April 2025, the Netherlands & England. Picture: Ian Lewington, Caroline Walta, Thijs Horst & Mars Muusse.
Red tibia ring r[5.T] and metal NLA 5.625.114, ringed as pullus Larus cachinnans at nest y-P:U60 on May 17 2022 in colony Lelystad, the Netherlands. Ringer: Herman Bouman.
ID certain in 2022: both parents are Caspian Gull cachinnans.
Red tibia R-5T and metal NLA Arnhem 5.625.114, ringed as pullus Larus cachinnans on 17-05-2022 at Lelystad - Bataviahaven, Holland (5230.00 N 525.00 E), ringer Albert de Jong.
Recoveries:
28-03-2023 Westerslag (Strand), Texel, NL 5.302,00 N 442,00 E colourring read Suse Kühn
05-04-2023 Westerslag (Strand), Texel, NL 5.302,00 N 442,00 E colourring read Bob Loos & Caroline Walta
08-04-2023 Westerslag (Strand), Texel, NL 5.302,00 N 442,00 E colourring read Bob Loos
09-04-2023 Westerslag (Strand), Texel, NL 5.302,00 N 442,00 E colourring read Bob Loos
10-04-2023 Westerslag (Strand), Texel, NL 5.302,00 N 442,00 E colourring read Job ten Horn
17-04-2023 Westerslag (Strand), Texel, NL 5.302,00 N 442,00 E colourring read Bob Loos
18-04-2023 Westerslag (Strand), Texel, NL 5.302,00 N 442,00 E colourring read Kees de Leeuw
19-04-2023 Westerslag (Strand), Texel, NL 5.302,00 N 442,00 E colourring read Rob Dekker
03-05-2023 Callantsoog (Strand), Noord-Holland, NL 5.250,00 N 441,00 E colourring read Fred Cottaar
25-01-2024 Appleford (Vuilstort), Oxfordshire, ENGELAND 5.137,00 N 114,00 W colourring read Ian Lewington
30-01-2024 Appleford (Vuilstort), Oxfordshire, ENGELAND 5.137,00 N 114,00 W colourring read Ian Lewington
Data for this nest 2022:
| date: | egg no: | width (mm) | length (mm) | volume (cm3): | water test on May 7th: | |
| 12-04-2022 | y-P:U60 present. Nest not excatly located yet, but close to place of previous season. | |||||
| egg no: | width (mm) | length (mm) | volume (cm3): | water test on May 7th: | ||
| 15-04-2022 | A | 51,8 | 72,9 | -- | 40 - tip at bottom. | 3 eggs in the nest. |
| B | 51,3 | 71,6 | -- | 30 - tip at bottom. | Extrapolation: 1st egg laid on April 9th; 1st egg will hatch on May 7th. Ring: May 14th. | |
| C | 50,1 | 70,5 | -- | 20 - tip at bottom. | ||
| sum nest: | -- | |||||
| 27-04-2022 | A | 4 mm- floating. | 3 eggs in the nest. | |||
| B | 3 mm- floating. | |||||
| C | 2 mm- floating. | |||||
| 09-05-2022 | y-P:U60 present. | |||||
| metal | darvic | mass | ||||
| 17-05-2022 | .5625114 | r-5T | 293 | Much fish around nest, incl Roach / Rudd and rounded Goby. | ||
| .5625115 | r-5S | 191 | ||||
| .5625116 | r-5R | 329 | ||||
| metal | darvic | mass | ||||
| 30-05-2022 | .5625116 | r-5R | 680 | y-P:U60 and partner are present, together with (at least) . | ||
| 02-06-2022 | 2 adults and 3 large chicks present. | |||||
| 17-06-2022 | 2 adults and (at least) 2 chicks present. | |||||
| 21-06-2022 | 2 adults and all 3 large chicks present. | |||||
| 28-06-2022 | 2 adults and all 3 large chicks present. | |||||
| 12-07-2022 | 2 adults and all 3 large chicks present. | |||||
below: Caspian Gull cachinnans 1|H 3CY & Caspian Gull cachinnans 5.T 4CY, April 12 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
At blue chair, dam 1.
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below: Caspian Gull cachinnans 5.T 3CY, Juanuary 30 2024, Appleford England. Picture: Ian Lewington.
below: Caspian Gull cachinnans 5.T 3CY, Juanuary 25 2024, Appleford England. Picture: Ian Lewington.
below: Caspian Gull cachinnans 5.T 2CY, April 05 2023, paal 15 - Texel beach, the Netherlands. Picture: Caroline Walta.
below: Caspian Gull cachinnans 5.T 1CY, July 12 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 5.T 1CY, June 28 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
r[5.T] cachinnans from nest y[P:U60]. Picture: June 28th, 2022.
Fledged. Sibling r[5.R] & r[5.S] also fledged.
below: Caspian Gull cachinnans 5.T 1CY, June 21 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
With r-5.S in background.
below: Caspian Gull cachinnans 5.T 1CY, May 17 2022, Lelystad, the Netherlands. Picture: Mars Muusse.
