Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans 7.U 1CY-2CY, May 2023 - November 2024, Lelystad & Almere, the Netherlands. Picture: Eric Roeland, Thijs Horst & Mars Muusse.
Tibia R-7U and metal NLA 5.625.193, ringed as pullus Larus cachinnans on May 11 2023 in nest 251 at colony Lelystad, the Netherlands (5230.00 N 525.00 E). Ringer Roland-Jan Buijs.
Recoveries:
11-05-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
18-05-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
27-05-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
18-06-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
26-06-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
15-07-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
07-10-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
13-10-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
30-10-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
04-11-2023 Almere (De Blocq van Kuffeler), Flevoland, NL 5.225,00 N 513,00 E colourring read Eric Roeland
12-11-2023 Almere (De Blocq van Kuffeler), Flevoland, NL 5.225,00 N 513,00 E colourring read Eric Roeland
29-11-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
01-12-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
03-12-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
28-12-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
30-12-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
31-12-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
02-01-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
03-01-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
06-01-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
12-01-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read T. Horst & M. Muusse
16-01-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read T. Horst & M. Muusse
18-01-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read T. Horst & M. Muusse
16-02-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
23-03-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
29-03-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
01-04-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
01-06-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
20-11-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
| 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 | 251-2023 | 70,7 | 50 | 88,99 | 68,1 | 51,4 | 90,59 | 67,7 | 49,1 | 82,18 | 261,76 | was 12-2022??? |
| ring pulli: May 10 | laying A egg: April 05 | hatch A egg: May 03 | ||||||||||
| catch: | date: | metal: | darvic: | mass: | wing: | head+bill: | ||||||
| Pullus | 11-5-2023 | 5.625.193 | r-7.U | 315 | 75.0 | 75.0 | two other chicks? Chicks not found | |||||
| Pullus | 18-5-2023 | 5.556.411 | g-7|V | 490 | 86,3 | 86,3 | ||||||
| Pullus | 18-5-2023 | 5.625.193 | r-7U | not measured, but was present. | ||||||||
| Pullus | 27-5-2023 | 5.625.193 | r-7U | 896 | ||||||||
| Pullus | 18-6-2023 | 5.625.193 | r-7U | |||||||||
| Pullus | 18-6-2023 | 5.556.411 | g-7|V | |||||||||
| 251-2023 | nest "White Buoy". | ||
| dam: | dam 2 west | ||
| location: | 1 mtr N blue sign VHF20, 2 mtr behind of white buoy. Could be parents nest 12-2020/2022. parents guarding from VHF20? | ||
| breeders: | cach x cach | ||
| OBSERVATIONS: | |||
| 9-4-2023 | nest: | 3 eggs measured. Watertest C-egg: 35 - tip bottom | |
| 27-4-2023 | adult: | breeding adult cach. | |
| 11-5-2023 | pulli: | 1 chick ringed, 2 more chicks? | |
| 18-5-2023 | pulli: | 2 chicks present. 1 ringed (R-7U), other unringed. The unringed one is now ringed today g-7|V | |
| 27-5-2023 | pulli: | 1x chick measured. | |
| 18-6-2023 | pulli: | g-7|V and r-7U together. | |
| 25-6-2023 | pulli: | G-7|V and r-7U together: 2 chicks fledged from this nest. | |
below: Caspian Gull cachinnans 7.U 2CY, November 20 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans 7.U 2CY, March 30 2024, Almere, the Netherlands. Picture: Eric Roeland.
below: Caspian Gull cachinnans 7.U 2CY, January 18 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 7.U 2CY, January 16 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 7.U 2CY, January 12 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 7.U 1CY, December 01 2023, Almere - De Vaart, the Netherlands. Picture Mars Muusse.
One parent is definitely Caspian Gull, the other is unknow, but Herring blood may be involved in this nest. Note:
- head still streaked densely, head shape rather rounded to angular, not pear-shaped as in most Caspians,
- dark underwing coverts,
- vermiculated fringes on tertials,
- Herring-like pattern on greater coverts.
In sibling g-7|V, note the extensive pale window on the inner primaries.
below: Caspian Gull cachinnans 7.U 1CY, November 29 2023, Almere, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans 7.U 1CY, November 12 2023, Almere, the Netherlands. Picture: Eric Roeland.
below: Caspian Gull cachinnans 7.U 1CY, October 31 2023, Almere, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans 7.U 1CY, October 07 2023, Almere - De Vaart, the Netherlands. Picture: Eric Roeland.
below: Caspian Gull cachinnans 7.U 1CY, July 15 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 7.U 1CY, June 25 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 7.U 1CY, June 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 7.U 1CY, May 27 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans 7.U 1CY, May 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans 7.U 1CY, May 11 2023, Lelystad colony, the Netherlands. Picture: Albert de Jong.
Ringed in nest 251.
