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 X56A 5CY-8CY, April 2022 - March 2025, the Netherlands. Picture: Eric Roeland, Thijs Horst & Mars Muusse.
DEH EA-202456 and y-X56A, ringed as pullus Caspian Gull (Larus cachinnans) on June 03 2018 in a mixed Caspian Gull colony at Gräbendorfer See - Lausitz, Brandenburg, Germany (51°42'00"N 14°06'00"E).
In 2022 breeding bird at colony Lelystad, the Netherlands with male cachinnans in nest 206 (y-X56A). Visits and data for this nest:
| date: | |||||||
| 11-04-2022 | yellow ring at this location, can it be y-X56A? | ||||||
| 12-04-2022 | 2 adults near nest. | ||||||
| egg no: | width (mm): | length (mm): | volume (cm3): | ||||
| 15-04-2022 | A | 52,2 | 74,5 | -- | 20 - tip bottom | 3 eggs | |
| B | 52,7 | 74,2 | 10 - tip bottom | ||||
| sum nest: | -- | ||||||
| 19-04-2022 | 2 adults near nest. | ||||||
| egg no: | 3 eggs, 2 adults (incl y-X56A). | ||||||
| 29-04-2022 | A | float - 3 mm | |||||
| B | float - 2 mm | ||||||
| C | float - halfway | ||||||
| 09-05-2022 | 3 eggs. Hatching day for B egg. Small hole in egg. | ||||||
| metal | colour | mass | |||||
| 17-05-2022 | .5625139 | r-54 | 251 | ||||
| .5625140 | r-55 | 181 | |||||
| .5625141 | r-53 | 225 | |||||
| 02-06-2022 | adult y-X56A present on bread. | ||||||
| 17-06-2022 | r-55 flying around; parent y-X56A ferociously protect the chick. | ||||||
| 21-06-2022 | adult y-X56A present. Chicks r-53, r-54, r-55 swimming around. | ||||||
| food: we catch r-55, throws up fish food. | |||||||
| 28-06-2022 | adult y-X56A present. Chicks r-53 & r-55 photographed. | ||||||
| 12-07-2022 | Chick r-55 photographed. | ||||||
| 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 | 229-2023 | 74 | 50 | 93,15 | 72,7 | 50,5 | 93,35 | 70,2 | 51,5 | 93,75 | 280,24 | X56A &cach |
| ring pulli: 15-mei | laying A egg: 10-apr | hatch A egg: 8-mei | ||||||||||
| catch: | date: | metal: | darvic: | mass: | wing: | head+bill: | ||||||
| pullus | 11-5-2023 | 5.556.455 | r-7Y | -- | -- | -- | ||||||
| pullus | 11-5-2023 | 5.556.456 | r-78 | -- | -- | -- | ||||||
| pullus | 18-5-2023 | 5.556.410 | g-7|U | 166 | -- | 63 | ||||||
| pullus | 18-5-2023 | 5.556.455 | r-7Y | 221 | -- | 65 | ||||||
| pullus | 27-5-2023 | 5.556.410 | g-7|U | 362 | -- | -- | ||||||
| pullus | 27-5-2023 | 5.556.455 | r-7Y | 499 | -- | -- | ||||||
| pullus | 25-6-2023 | 5.556.456 | r-78 | 1028 | 355 | 128,1 | ||||||
| 229-2023 | y[X56A] is breeding in 229 (X56A was at nest 206 in 2022) | ||
| dam: | dam 2 west | ||
| location: | 25 mtr east of lighthouse, old Spoonbill nest, between bushes = nest 229-2022 of sub-adults. | ||
| breeders: | cach x cach | ||
| OBSERVATIONS: | |||
| 09-04-2023 | y-X56A present north of dam. (27/4: yX56A not breeding at this nest in 2023). | ||
| 26-04-2023 | eggs: | 3 eggs. Measured and water test: A/B/C:all are 90 - tip bottom. | |
| nest: | code 229 sprayed on entrance block. | ||
| 27-04-2023 | adult: | parent 1 = yX56A | |
| 11-05-2023 | pulli: | 2 chicks ringed, 3rd egg hatching. | |
| 13-05-2023 | adult: | partner 2 is cach. | |
| 18-05-2023 | pulli: | 2 chicks present (R-7Y and unringed one, which is now ringed). | |
| 27-05-2023 | pulli: | 2x ringed birds measured: g-7|U & r-7Y. | |
| 18-06-2023 | adult: | ad yX56A easy at bread. | |
| 25-06-2023 | pulli: | r-78 and g-7|U present. | |
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: | |
| X56A-2024 | cach | cach | 75,1 | 51,3 | 99,51 | 74,3 | 52 | 101,16 | 70,4 | 50,3 | 89,68 | 290,35 | |
| # eggs | A-egg | hatch | # ringed chicks | # all chicks | # fledged chicks | comments | |||||||
| 3 | 15-4-2024 | 13-5-2024 | |||||||||||
| dam: | dam 2 west | ||||||||||||
| location: | Between Spoonbills and Little Egret, was X56A-2023 | ||||||||||||
| parents? | same as 2023 | ||||||||||||
| ring pulli: | 18-May | ||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale |
| 14-05-2024 | g-B|W | .5631174 | nest X56A | PONT | 1CY | 159 | |||||||
| 14-05-2024 | g-B|X | .5631175 | nest X56A | PONT | 1CY | 120 | |||||||
| OBSERVATIONS: | |||||||||||||
| 08-03-2024 | adults: | yX56A on bread. | |||||||||||
| 20-03-2024 | adults: | yX56A on bread. | |||||||||||
| 21-04-2024 | eggs: | 3 eggs, measured. | |||||||||||
| adult: | X56A at nest. | ||||||||||||
| 23-04-2024 | adults: | yX56A leaves the nest | |||||||||||
| 02-05-2024 | eggs: | 3 eggs. | |||||||||||
| 07-05-2024 | eggs: | 3 eggs, not measured. | |||||||||||
| 14-05-2024 | chicks: | 2x ringed. | |||||||||||
| eggs: | 1x cold. |
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| 18-06-2024 | chicks: | g-B|W at water with 2x other juveniles. | |||||||||||
| food: | g-B|W trapped, food = fish (Roach). | ||||||||||||
below: Caspian Gull cachinnans X56A 8CY, March 25 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
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below: Caspian Gull cachinnans X56A 8CY, March 21 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
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below: Caspian Gull cachinnans X56A 8CY, March 16 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans X56A 7CY, June 04 2024, colony Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans X56A 7CY, March 25 2024, Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans X56A 7CY, March 20 2024, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans X56A 7CY, March 08 2024, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans X56A 7CY, February 27 2024, Almere - De Vaart, the Netherlands. Picture: Mars Muusse.
below: Caspian Gull cachinnans X56A 6CY, December 06 2023, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans X56A 6CY, July 08 2023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans X56A 6CY, April 27 2023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans X56A 6CY, April 09 2023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans X56A 6CY, February 19 2023, Almere, the Netherlands. Picture: Eric Roeland.
below: Caspian Gull cachinnans X56A 5CY, June 28 2022, Lelystad, the Netherlands. Picture: Mars Muusse.
below: Caspian Gull cachinnans X56A 5CY, June 17 2022, Lelystad, the Netherlands. Picture: Mars Muusse.
Always easy on bread.
Defending chick r[5.5].
below: Caspian Gull cachinnans X56A 5CY, June 02 2022, Lelystad, the Netherlands. Picture: Mars Muusse.
below: Caspian Gull cachinnans X56A 5CY, April 29 2022, Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans X56A 5CY, April 19 2022, Lelystad, the Netherlands. Picture: Mars Muusse.
Nest nest 206 (aka y-X56A), in cluster with nests 12, 203, 204, 207, 227, 229; all pure Caspian Gull nests.
below: Caspian Gull cachinnans X56A 5CY, April 11 2022, Lelystad, the Netherlands. Picture: Mars Muusse.
