Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans X60J 4CY-7CY, 2022-2025, Lelystad & Almere, the Netherlands. Picture: Thijs Horst & Mars Muusse.
DEH EA-222960 and y-X60J, ringed as pullus Caspian Gull (Larus cachinnans) on June 26 2019 in a mixed Caspian Gull colony at Laußig, Sachsen, Germany (51°34'00"N 12°38'00"E).
In 2022 a prospecting bird at colony Lelystad, the Netherlands. In 2023-2025 breeding in colony Lelystad.
Visits and data for 2023:
| egg sizes & volume 2023 | ||||||||||||
| SPECIES | NEST | A_length | A_width | A_volume | B_length | B_width | B_volume | C_length | C_width | C_volume | TOTAL NEST: | known parents? |
| cach x cach | X60J-2023 | 71,6 | 49 | 86,56 | 71,5 | 49,2 | 87,14 | 69,5 | 47,7 | 79,62 | 253,32 | X60J & cach |
| ring pulli: 14-mei | laying A egg: 9-apr | hatch A egg: 7-mei | ||||||||||
| catch: | date: | metal: | darvic: | mass: | ||||||||
| pullus | 11-05-2023 | 5.556.454 | r 7.7 | -- | very small | |||||||
| pullus | 27-05-2023 | 5.556.454 | r-7.7 | 649 | ||||||||
| pullus | 27-05-2023 | 5.625.256 | g-8|9 | 755 | ||||||||
| X60J-2023 | |||
| dam: | dam 2 west | ||
| location: | 2 mtr E of lighthouse. | ||
| breeders: | cach x cach | ||
| OBSERVATIONS: | |||
| 09-04-2023 | nest: | 1 egg measured. No watertest, ring chicks in 1st session. Parent is yX60J 5CY. | |
| 26-04-2023 | nest: | 3 eggs. Measured, no water test, date of A-egg known. | |
| 27-04-2023 | adult: | 4CY cach at nest = partner 2. | |
| 30-04-2023 | adult: | X60J at nest. | |
| 11-05-2023 | pulli | 1 chick ringed, 2 other chicks? | |
| 27-05-2023 | pulli | 2x chicks measured: r-77 & g-8|9. | |
| adult: | patrolling overhead in this area: w[482:U]. | ||
| 25-06-2023 | adult: | X60J present in water north of dam 2, with 1 unringed chick. Result: 3 chicks fledged (?) at nest X60J. | |
Visits and data 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: | |
| X60J 2024 | cach | cach | 69,6 | 50,7 | 90,08 | 71 | 48,1 | 82,71 | 69,7 | 48,6 | 82,89 | 255,68 | |
| # eggs | A-egg | hatch | # ringed chicks | # all chicks | # fledged chicks | comments | |||||||
| 3 | 15-4-2024 | 11-5-2024 | |||||||||||
| dam: | dam 2 central | ||||||||||||
| location: | On N-side, was nest 253-2023 | ||||||||||||
| parents? | y-X60J is new breeder here. Was at lighthouse dam 2 in 2023. | ||||||||||||
| ring pulli: | 16-May | ||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale |
| 14-05-2024 | g-B|V | .5631173 | nest X60J | PONT | 1CY | 81 | |||||||
| 04-06-2024 | g-M|J | .5631147 | nest X60J | PONT | 1CY | 220 | 886 | 110 | |||||
| OBSERVATIONS: | |||||||||||||
| 26-03-2024 | adults: | Nest site 253-2023 (behind 17) has female cach y-X60J & unringed male cach | |||||||||||
| 31-03-2024 | adults: | female cach y-X60J & unringed male cach | |||||||||||
| 12-04-2024 | nest: | nest empty. | |||||||||||
| 21-04-2024 | eggs: | 3 eggs, measured. | |||||||||||
| 23-04-2024 | adults: | female cach y-X60J & unringed male cach | |||||||||||
| 07-05-2024 | nest: | 3 eggs. | |||||||||||
| 14-05-2024 | chicks: | 1x ringed and measured. | |||||||||||
| food: | Round Goby (zwartbekgrondel / Neogobius melanostomus). | ||||||||||||
| 04-06-2024 | chicks: | 1x ringed. No other chicks around. Two parents guarding this only chick. | |||||||||||
| 18-06-2024 | chicks: | trapped at water: g-M|J. | |||||||||||
Data & visits for 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 | |
| y-X60J (253) | cach | cach | 71,7 | 50 | 68,4 | 49 | 66,6 | 49,2 | 3 | |||||
| dam: | dam 2 central
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| location: | was nest X60J-2024, 3 meters N of 17, N-side of dam,
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| parents: | same as 2024
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| ringed: | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale | |
| 31-05-2025 | G-R|0 | 5,641,925
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PONT | pullus | 780 | |||||||||
| 09-06-2025 | G-R|0 | 5,641,925
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CONTROL | PONT | pullus | 931 | ||||||||
| 14-06-2025 | G-R|0 | 5,641,925
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CONTROL | PONT | pullus | 1058 | ||||||||
OBSERVATIONS:
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| 16-03-2025 | nest | X60J present on blocks dam 1, not dam 2 (location 2024),
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| 20-03 | nest | X60J present at nest
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| 01-04 | nest | X60J present at nest
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| 21-04 | eggs | 3x eggs measured,
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| 08-05 | adult | X60J present
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| 31-05 | chicks | g-R|0 probably their chick, caught on water X60J alarming above. Ringed & measured.
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| 09-06 | chicks | g-R|0 at water again, near nest b-F|=, CONTROL measure.
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| 14-06 | chicks | g-R|0 at water again, near nest b-F|=, CONTROL measure.
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below: Caspian Gull cachinnans X60J 7CY, July 09 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
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below: Caspian Gull cachinnans X60J 7CY, July 08 2025, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.
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below: Caspian Gull cachinnans X60J 7CY, June 10 2025, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.
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below: Caspian Gull cachinnans X60J 7CY, March 16 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans X60J 6CY, November 21 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans X60J 6CY, July 09 2024, colony Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans X60J 6CY, June 29 2024, colony Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans X60J 6CY, June 13 2024, colony Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans X60J 6CY, June 04 2024, colony Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans X60J 6CY, March 26 2024, Almere, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans X60J 6CY, March 25 2024, Almere, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans X60J 6CY, March 19 2024, Almere, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans X60J 6CY, January 18 2024, Almere, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans X60J 5CY, December 06 2023, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans X60J 5CY, November 29 2023, Almere, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans X60J 5CY, July 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans X60J 5CY, July 15 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans X60J 5CY, June 25 2023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans X60J 5CY, April 09 023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
Nest at dam 2 - most western nest in 2023 near lighthouse.
below: Caspian Gull cachinnans X60J 5CY, April 04 023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans X60J 4CY, July 17 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans X60J 4CY, April 29 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
