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 hybrid 5.0 1CY-3CY, May 2022 - April 2024, the Netherlands & Spain.
Picture: Eric Roeland, Thijs Horst, Mars Muusse, Gonzalo Pardo de Santayana, Samuel De la Torre & Rubén Piculo.
Red tibia ring r[5.0] and metal NLA 5.625.129, ringed as pullus Larus cachinnans at nest 221 / y[XCHP] on May 17 2022 in colony Lelystad, the Netherlands. Ringer: Herman Bouman.
ID certain in 2022, both parents are hybrid Caspian Gull cachinnans: mother is hybrid y[XCHP] from Germany and father is hybrid-type 4CY.
Recoveries:
30-05-2022 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E captured by ringer Albert de Jong
03-12-2022 Santoña (Ría de Boo), Cantabria, SPANJE 4.326,00 N 327,00 W colourring read Rubén Piculo
10-12-2022 Santoña (Ría de Boo), Cantabria, SPANJE 4.326,00 N 327,00 W colourring read Samuel De la Torre
31-12-2022 Santoña (Ría de Boo), Cantabria, SPANJE 4.326,00 N 327,00 W colourring read Gonzalo Pardo de Santayana & Jesús Menéndez
31-03-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
01-04-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Jan Zorgdrager
15-04-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
30-03-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
12-04-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
12-04-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read M. Loeve & M. Muusse
31-05-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Merijn Loeve
Nest XCHP in 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 | XCHP | 70,6 | 52,2 | 96,86 | 67 | 52,7 | 93,69 | 68,3 | 50,8 | 88,75 | 279,30 | same as 2022 |
| ring pulli: 12-mei | laying A egg: 7-apr | hatch A egg: 5-mei | ||||||||||
| catch: | date: | metal: | darvic: | mass: | wing: | head+bill: | ||||||
| Pullus | 11-05-2023 | 5.556.464 | r-8S | -- | -- | -- | ||||||
| Pullus | 11-05-2023 | 5.556.465 | r-89 | -- | -- | -- | ||||||
| Pullus | 18-05-2023 | 5.556.465 | r-89 | 550 | -- | 80,4 | ||||||
| Pullus | 27-05-2023 | 5.556.464 | r-8S | dead > 7 days ago. | ||||||||
| Pullus | 18-06-2023 | r-89 | 1103 | 362 | 130,7 | |||||||
| XCHP | ||||
| dam: | dam 2 east | |||
| location: | below large boulders, east side of blocks, closer to bitumen than 2022. | |||
| breeders: | cach x cach | |||
| OBSERVATIONS: | ||||
| 04-04-2023 | adult: | yXCHP present with partner. | ||
| 05-04-2023 | adult: | yXCHP present with partner. | ||
| 09-04-2023 | adult: | 2 adult cach present. One is yXCHP. | ||
| nest: | 2 eggs measured. No watertest, ring chicks in 1st session. | |||
| 26-04-2023 | nest: | 3 eggs, all measured. Red spot sprayed on stone. | ||
| 27-04-2023 | nest: | 3 eggs. | ||
| adult: | yXCHP present with partner. | |||
| 11-05-2023 | pulli: | 2 chicks ringed, 1 egg rotten | ||
| 13-05-2023 | adult: | yXCHP pictures. | ||
| 18-05-2023 | pulli: | R-89 present | ||
| 27-05-2023 | pulli: | dead chick near nest r-8S, dead >7 days. | ||
| 18-06-2023 | pulli: | r-89 present. Fledging success: 1 chick. | ||
| 25-06-2023 | pulli: | r-89 present with both parents | ||
below: Caspian Gull cachinnans hybrid 5.0 3CY, April 12 2024, Almere, the Netherlands. Picture: Merijn loeve & Mars Muusse.
below: Caspian Gull cachinnans hybrid 5.0 3CY, March 30 2024, Almere, the Netherlands. Picture: Eric Roeland.
below: Caspian Gull cachinnans hybrid 5.0 2CY, March 31 2023, Almere, the Netherlands. Picture: Eric Roeland.
below: Caspian Gull cachinnans hybrid 5.0 1CY, December 31 2022, Santoña, Spain. Picture: Gonzalo Pardo de Santayana.
below: Caspian Gull cachinnans hybrid 5.0 1CY, December 10 2022, Santoña, Spain. Picture: Samuel De la Torre.
below: Caspian Gull cachinnans hybrid 5.0 1CY, December 03 2022, Santoña, Spain. Picture: Rubén Piculo.
Both parents are hybrid, but this offspring very much resembles Caspian Gull.
Observers: Rubén Piculo, Carlos Mompó and Mateo Ferrer.
below: Caspian Gull cachinnans hybrid 5.0 1CY, June 28 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
r[5.0] cachinnans hybrid from nest 221 y[XCHP]. Picture: June 28th, 2022.
Fledged. Sibling r[5.1], the 2nd chick, also fledged.
Below: primary pattern nice match to Caspian Gull.
below: Caspian Gull cachinnans hybrid 5.0 1CY, June 21 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans hybrid 5.0 1CY, May 30 2022, Lelystad, the Netherlands. Picture: Mars Muusse.
