Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans x Herring Gull argenteus hybrid 8|P 1CY, May 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
Tibia ring G-8|P and metal NLA 5.625.264, ringed as pullus Larus cachinnans hybrid on May 18 2023 in nest 048 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team.
| 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 teus | 48-2023 | 73,2 | 48,5 | 86,69 | 72,4 | 48,2 | 84,69 | 67,5 | 48,4 | 79,61 | 251,00 | same as 2022 |
| ring pulli: 20-mei | laying A egg: 15-apr | hatch A egg: 13-mei | ||||||||||
| catch: | date: | metal: | darvic: | mass: | wing: | head+bill: | ||||||
| Pullus | 27-5-2023 | 5.625.264 | G-8|P | 394 | -- | -- | is nest 15B, full throat pouch with fish. | |||||
| Pullus | 27-5-2023 | 5.625.281 | G-8|R | 435 | -- | -- | is nest 15B | |||||
| Pullus | 18-6-2023 | 5.625.281 | G-8|R | 918 | 301 | 113,0 | hybrid type | |||||
| 48-2023 | was 15B | ||||||
| dam: | dam 2 central | ||||||
| location: | Next to prunus, 1 mtr E of code 44 on blocks. 4 mtr from waterfront. | ||||||
| breeders: | cach x teus | ||||||
| OBSERVATIONS: | |||||||
| 09-4-2023 | nest: | no eggs, nest is ready. | |||||
| 26-4-2023 | nest: | 3 eggs measured, and water test: | A: 80 - tip bottom | ||||
| B: 80 - tip bottom | |||||||
| 27-4-2023 | adult: | cach & teus, cach breeding. | C: 90 - tip bottom | ||||
| cach with patterns on P4. | |||||||
| 11-5-2023 | eggs | floating - 5 mm. | |||||
| 27-5-2023 | pulli: | 2x chicks ringed and measured. | |||||
| 18-6-2023 | pulli: | 1x control of g-8|R, which is hybrid type. Fledged: 1x juvenile. | |||||
| 25-6-2023 | pulli: | G-8|R present. | |||||
below: Caspian Gull cachinnans x Herring Gull argenteus hybrid 8|P 1CY, May 27 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
