Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans 9|B 1CY, June - July 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
Tibia ring G-9|B and metal NLA 5.625.278, ringed as pullus Larus cachinnans on May 27 2023 in nest 033 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 cach | 33-2023 | 77 | 49 | 93,09 | 70,7 | 49,2 | 86,17 | -- | -- | -- | -- | male of 2022, female possibly |
| ring pulli: -- | laying A egg: -- | hatch A egg: -- | ||||||||||
| catch: | date: | metal: | darvic: | mass: | wing: | head+bill: | ||||||
| Pullus | 18-05-2023 | 5.556.496 | G-7|D | -- | -- | 79 | ||||||
| Pullus | 27-05-2023 | 5.556.496 | G-7|D | 589 | -- | -- | ||||||
| Pullus | 27-05-2023 | 5.625.278 | G-9|B | 452 | -- | -- | ||||||
| Pullus | 18-06-2023 | 5.625.278 | G-9|B | -- | -- | -- | ||||||
| Pullus | 18-06-2023 | 5.556.496 | G-7|D | 842 | 335 | 118,8 | ||||||
| 33-2023 | ||
| dam: | dam 1 blocks | |
| location: | !!! Nest is even further east, 1 mtr from Rose-bush. Top of dam, most eastern nest in section. | |
| breeders: | cach x cach | |
| OBSERVATIONS: | ||
| 09-04-2023 | nest: | most western part of blocks. Code 112 on bitumen with arrow, no eggs but nest is ready. |
| adult: | adult cach near nest. Guarding. | |
| 26-04-2023 | nest: | Nest with 1 egg, 1 mtr east of old location (27/4: is LBBG!) |
| eggs: | 1x egg, measured. No water test. (27/4: data skipped, wrong nest). | |
| 27-04-2023 | nest: | !!! Nest is even further east, 1 mtr from Rose-bush. Top of dam, most eastern nest in section. |
| eggs: | 2x egg, measured. No water test. | |
| adult: | 2x cach, one was breeding and stepped from this nest. | |
| 11-05-2023 | nest: | nest empty, no chicks found |
| 13-05-2023 | adult: | 2x cach photographed. Behaviour: they have chicks. |
| 18-05-2023 | pulli: | 1 chick found and ringed |
| 27-05-2023 | pulli: | 1x control chick. 1x new ringed chick. |
| 18-06-2023 | pulli: | 2x chicks with 2 adults at nest site. Fledged: 2 juveniles (nest had 2 eggs only from the start). |
| 25-06-2023 | pulli: | both chicks present. Started with 2 eggs, both juveniles fledged. |
below: Caspian Gull cachinnans 9|B 1CY, July 15 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 9|B 1CY, July 08 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 9|B 1CY, June 25 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans 9|B 1CY, June 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
