Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans hybrid R|V 1CY, 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
| You can participate in this project too! Please send in your observations of colour ringed birds to: ring@buijsecoconsult.nl |
Tibia G-R|V and metal NLA 5.641.917, ringed as pullus Larus cachinnans x argentatus hybrid on May 31 2025 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team (Mars Muusse / Thijs Horst / Fred Cottaar).
Mother: adult Herring Gull b/w-AB.
Father: adult Caspian Gull r-7P.
Nest: r-7P & b/w-AB.
In 2025 g-R|V & g-R|X fledged, g-R|W not seen since ringing. Fledging rate for this nest 2025 = 2,0.
Recoveries:
=
Visits and data 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:
|
# eggs |
| r-7P & b/w-AB | cach | teus | 70,5 | 50,6 | 69,9 | 49,2 | 69 | 48,8 | 3 | ||||
| dam: | dam 1 west
|
||||||||||||
| location: | was r7P-2024, far west
|
||||||||||||
| parents: | same as 2024
|
||||||||||||
| ringed: | |||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | |
| 31-05-2025 | g-R|V | 5641917 | r-7P & b/w-AB | HYBRID | pullus | 562 | |||||||
| 31-05-2025 | g-R|W | 5641918 | r-7P & b/w-AB | HYBRID | pullus | 454 | |||||||
| 31-05-2025 | g-R|X | 5641919 | r-7P & b/w-AB | HYBRID | pullus | 488 | |||||||
OBSERVATIONS:
|
|||||||||||||
| 16-03-2025 | nest | r-7P at location 2024, female is HG b/w-AB which was present, at bread
|
|||||||||||
| 21-03 | nest | both partners present near nest location
|
|||||||||||
| 25-03 | nest | r-7P present at nest location
|
|||||||||||
| 01-04 | nest | r-7P present at nest location
|
|||||||||||
| 04-04 | nest | r-7P and partner present
|
|||||||||||
| 21-04 | eggs | 3x eggs measured
|
|||||||||||
| food | leg of Greyleg goose chick
|
||||||||||||
| 13-05 | nest | 3 eggs hatching
|
|||||||||||
| 31-05 | chicks | 3x chicks ringed
|
|||||||||||
below: Caspian Gull cachinnans hybrid R|V 1CY, June 29 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
.jpg)
below: Caspian Gull cachinnans hybrid R|V 1CY, May 31 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
| date | darvic | metal | nest | species | sexe | age | wing | mass | head+ bill | bill | gonys | barcode | comments |
| 31-05-2025 | G-R|V | .5641917 | r-7P & b/w-AB | HYBRID | pullus | 562 | Ringed pullus | ||||||
| 29-06-2025 | G-R|V | NEST R-7P | HYBRID | pullus | 338 | 702 |
