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 P:AM0 4CY-6CY, 2023 - 2025, Almere & Lelystad, the Netherlands. Picture: Mars Muusse & Thijs Horst.
Caspian Gull (Larus cachinnans) with yellow tarsus P:AM0. Ringed as pullus on May 30 2020 in a mixed colony (Larus cachinnans kolonia) at Otwock (Kępa Nadbrzeska), Poland.
In 2024: breeding at Lelystad with partner g-AE, nest yPAM0-gAE.
In 2025: breeding at Lelystad with partner g-M3, nest yPAM0-gM3.
Recoveries:
| 09/05/2020 | WYSPA NA RZ.WISŁA,KĘPA NADBRZESKA,OTWOCK, POLAND (MAZOWIECKIE) | Dolina Środkowej Wisły, Marcin Sidelnik, Hubert Mateuszczyk |
| 22/04/2021 | Rieselfelder Münster, GERMANY (NORDRHEIN-WESTFALEN: MÜNSTER) | Laurin Temme |
| 05/08/2021 | Rieselfelder, area E1, Münster, NRW, GERMANY (NORDRHEIN-WESTFALEN: MÜNSTER) | A. Wansing |
| 06/11/2021 | harbour Hamm Uentrop, GERMANY (NORDRHEIN-WESTFALEN: ARNSBERG) | Armin Langer |
| 04/03/2022 | Oss, Elzenburg, NETHERLANDS (NOORD-BRABANT) | Jaap van der Linden |
| 19/05/2022 | RZ.WISŁA,PODOLE,RACIĄŻEK, POLAND (KUJAWSKO-POMORSKIE) | Kamil Zięba |
| 28/05/2022 | Rieselfelder Münster, GERMANY (NORDRHEIN-WESTFALEN: MÜNSTER) | Laurin Temme |
| 23/09/2022 | Oss, Elzenburg, NETHERLANDS (NOORD-BRABANT) | Jaap van der Linden & Tim Raats |
| 23/11/2022 | habour Hamm-Uentrop; Datteln-Hamm Kanal, GERMANY (NORDRHEIN-WESTFALEN: ARNSBERG) | Armin Langer |
| 21/02/2023 | Salzgitter-Heerte:Deponie, GERMANY (NIEDERSACHSEN: BRAUNSCHWEIG) | Gerhard Braemer |
| 03/03/2023 | Dump, Barneveld, NETHERLANDS (GELDERLAND) | August van Steensel |
| 05/06/2023 | Ingelheim, GERMANY (RHEINLAND-PFALZ: RHEIN-HESSEN-PFALZ) | Wolfgang Henkes |
| 18/06/2023 | Bataviahaven, Lelystad, NETHERLANDS (FLEVOLAND) | thijs horst, Mars Muusse |
| 22/06/2023 | Almere de Vaart, NETHERLANDS (FLEVOLAND) | thijs horst |
| 27/06/2023 | Almere de Vaart, NETHERLANDS (FLEVOLAND) | thijs horst, Mars Muusse |
| 08/07/2023 | Bataviahaven, Lelystad, NETHERLANDS (FLEVOLAND) | thijs horst, Mars Muusse |
| 08/03/2024 | Bataviahaven, Lelystad, NETHERLANDS (FLEVOLAND) | thijs horst, Mars Muusse |
| 19/03/2024 | Bataviahaven, Lelystad, NETHERLANDS (FLEVOLAND) | thijs horst, Mars Muusse |
| 20/03/2024 | Bataviahaven, Lelystad, NETHERLANDS (FLEVOLAND) | thijs horst, Mars Muusse |
| 26/03/2024 | Bataviahaven, Lelystad, NETHERLANDS (FLEVOLAND) | thijs horst, Mars Muusse |
| 30/03/2024 | Bataviahaven, Lelystad, NETHERLANDS (FLEVOLAND) | thijs horst, Harry Kuipers |
| 31/03/2024 | Bataviahaven, Lelystad, NETHERLANDS (FLEVOLAND) | thijs horst, Mars Muusse |
| 08/04/2024 | Bataviahaven, Lelystad, NETHERLANDS (FLEVOLAND) | thijs horst, Mars Muusse, Gabi Martin, Theo Muusse |
| 21/04/2024 | Bataviahaven, Lelystad, NETHERLANDS (FLEVOLAND) | thijs horst, Mars Muusse |
| 26/04/2024 | Bataviahaven, Lelystad, NETHERLANDS (FLEVOLAND) | thijs horst, Mars Muusse, Albert de Jong |
| 05/05/2024 | Bataviahaven, Lelystad, NETHERLANDS (FLEVOLAND) | thijs horst, Mars Muusse, Fred Cottaar |
| 17/05/2024 | Bataviahaven, Lelystad, NETHERLANDS (FLEVOLAND) | thijs horst |
| 03/06/2024 | Almere de Vaart, NETHERLANDS (FLEVOLAND) | thijs horst, Henk Westers |
| 04/06/2024 | Bataviahaven, Lelystad, NETHERLANDS (FLEVOLAND) | thijs horst, Mars Muusse, Albert de Jong |
| 13/06/2024 | Almere de Vaart, NETHERLANDS (FLEVOLAND) | thijs horst |
| 08/07/2024 | Almere de Vaart, NETHERLANDS (FLEVOLAND) | thijs horst |
| 27/10/2024 | Oostvaardersdiep, Almere, NETHERLANDS (FLEVOLAND) | thijs horst |
| 18/02/2025 | Almere de Vaart, NETHERLANDS (FLEVOLAND) | Mars Muusse |
Visits and data P:AM0 & g-A|E (2024):
| NEST code | parent 1 | parent 2 | A_length | A_width | A_volume | B_length | B_width | B_volume | C_length | C_width | C_volume | TOTAL NEST: | |
| P:AM0 & g-A|E | cach | cach | 73,6 | 49 | 88,98 | 70 | 50,3 | 89,17 | 68,5 | 48,5 | 81,13 | 259,28 | |
| 2024 | # eggs | A-egg | hatch | # ringed chicks | # all chicks | # fledged chicks | comments | ||||||
| 3 | 10-4-2024 | 6-5-2024 | |||||||||||
| dam: | dam 1 west | ||||||||||||
| location: | Is nest 63-2021/2023. The west nest in the complex. | ||||||||||||
| parents? | y-P:AM0 is new breeder. | ||||||||||||
| ring pulli: | 11-May | ||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale | 26-04-2024 | g-A|E | .5625294 | nest PAM0 | PONT | F | >4CY | 443 | 1075 | 126,3 | 53,0 | 66,7 | 18,1 | 5 |
| 31-05-2024 | g-C|Z | .5631125 | y-P:AM0 g-A|E | PONT | 1CY | ||||||||
| 31-05-2024 | g-C|0 | .5631126 | y-P:AM0 g-A|E | PONT | 1CY | ||||||||
| 31-05-2024 | g-C|1 | .5631127 | y-P:AM0 g-A|E | PONT | 1CY | ||||||||
| 04-06-2024 | g-C|Z | .5631125 | y-P:AM0 g-A|E | PONT | 1CY | 220 | 809 | 105,7 | |||||
| OBSERVATIONS: | |||||||||||||
| 08-03-2024 | adult: | y-PAM0. | |||||||||||
| 31-03-2024 | adults: | both parents present. | |||||||||||
| 12-04-2024 | eggs: | 1 egg, measured. | |||||||||||
| 21-04-2024 | eggs: | 3, measured. | |||||||||||
| nest: | cluster again: 60, 69, PAM0, n-F|+, and 2 Herrings to follow soon. | ||||||||||||
| 26-04-2024 | adult: | adult female trapped at nest, now g-A|E. | |||||||||||
| food: | Perch vomit when adult trapped. | ||||||||||||
| 02-05-2024 | eggs: | 3 eggs. | |||||||||||
| 05-05-2024 | nest: | 3 eggs, not measured. | |||||||||||
| 31-05-2024 | chicks: | 3x ringed. | |||||||||||
| 04-06-2024 | chick: | g-C|Z present. measured. | |||||||||||
| 18-06-2024 | chicks: | g-C|0 & g-C|1 dead. | |||||||||||
| chick: | CONTROLL: g-C|Z. | ||||||||||||
Data for nest P:AM0 & g-M|3 (2025):
| 2025 | parent 1 | parent 2 | A_length | A_width | A_volume | B_length | B_width | B_volume | C_length | C_width | C_volume | TOTAL NEST:
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# eggs | |
| P:AM0 & M|3 | cach | cach | 70,6 | 51,5 | 68,1 | 50,1 | 2 | |||||||
| dam: | dam 2, next to lighthouse
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| location: | New nest, 2 m W of g-A|C (orange football),
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| ouders: | ||||||||||||||
| ring pulli: | ||||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale | |
| 23-4-2025 | g-M|3 | 5641004 | Nest PAM0 | cach | F | >4CY | 421 | 929 | 122,8 | 53,2 | 65,4 | 16,8 | 6 | |
| 31-5-2025 | g-R|D | 5641895 | y-P:AM0 & g-M|3 | PONT | pullus | 426 | ||||||||
| 31-5-2025 | g-R|E | 5641896 | y-P:AM0 & g-M|3 | PONT | pullus | 465 | ||||||||
OBSERVATIONS:
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| 3/16/2025 | nest | PAM0 not present, female g-A|E present, slightly more to the west on dam 1,
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| 3/21/2025 | feeding | PAM0 on bread near poles dam 2, not seen at nest location, g-A|E not seen that day
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| 3/25/2025 | feeding | PAM0 present at Almere wastedump
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| 4/12/2025 | nest | PAM0 at location nest 203-2020, between Spoonbills,
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| 4/21/2025 | nest | 2 eggs, measured,
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| 4/23/2025 | nest | 2 eggs, | ||||||||||||
| adult | trapped female, now g-M|3, incubating 2 eggs at nest PAM0,
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| 4/28/2025 | nest | 2 eggs | ||||||||||||
| 1/5/2025 | nest | 2 eggs | ||||||||||||
| 8-5-2025 | adult | y-P:AM0 present
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| 13-5-2025 | nest | 1 wet chick, 1 hatching
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| 31-5-2025 | nest | 2 chicks ringed
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below: Caspian Gull cachinnans P:AM0 6CY, August 04 2025, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.
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below: Caspian Gull cachinnans P:AM0 6CY, May 08 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
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below: Caspian Gull cachinnans P:AM0 6CY, May 05 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans P:AM0 6CY, April 12 2025, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.
Breeder for dam 2 West this season.
below: Caspian Gull cachinnans P:AM0 6CY, April 04 2025, Almere - De Vaart, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans P:AM0 6CY, March 25 2025, Almere - De Vaart, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans P:AM0 6CY, March 21 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans P:AM0 6CY, February 18 2025, Almere - De Vaart, the Netherlands. Picture: Mars Muusse.
below: Caspian Gull cachinnans P:AM0 5CY, October 27 2024, Almere - Oostvaardersdijk, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans P:AM0 5CY, July 08 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans P:AM0 5CY, June 13 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans P:AM0 5CY, June 03 2024, colony Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans P:AM0 5CY, March 31 2024, colony Lelystad, the Netherlands. Picture: Mars Muusse & Thijs Horst.
Below: partner of y-P:AM0.
below: Caspian Gull cachinnans P:AM0 5CY, March 19 2024, colony Lelystad, the Netherlands. Picture: Mars Muusse & Thijs Horst.
below: Caspian Gull cachinnans P:AM0 5CY, March 08 2024, colony Lelystad, the Netherlands. Picture: Mars Muusse & Thijs Horst.
below: Caspian Gull cachinnans P:AM0 4CY, July 08 2023, colony Lelystad, the Netherlands. Picture: Mars Muusse & Thijs Horst.
