Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans 8.K 1CY, May - June 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
Tibia ring R-8.K and metal NLA 5.556.468, ringed as pullus Larus cachinnans on May 18 2023 in nest 038 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 hybrid | 38-2023 | 69 | 50 | 86,85 | 68,6 | 52 | 93,40 | 67,8 | 51,9 | 91,95 | 272,20 | same as 2022 |
| ring pulli: 14-mei | laying A egg: 11-apr | hatch A egg: 9-mei | ||||||||||
| catch: | date: | metal: | darvic: | mass: | wing: | head+bill: | ||||||
| Pullus | 11-5-2023 | NLA 5.556.468 | R-8.K | (on 18-5) 235 | (on 18-5) 67 | |||||||
| Pullus | 18-5-2023 | NLA 5.556.421 | G-7|2 | 152 | 59,8 | |||||||
| Pullus | 18-6-2023 | NLA 5.556.468 | R-8.K | 1077 | 328 | 122,4 | ||||||
| Pullus | 18-6-2023 | NLA 5.556.421 | G-7|2 | 887 | 311 | 112,7 | ||||||
| 38-2023 | ||||||
| dam: | dam 2 east of T-split | |||||
| location: | 2 large boulders, west one is lookout post, 200 mtr E of T-split, on top of tarmac. Red flag at N-side between blocks. | |||||
| breeders: | cach x river gull | |||||
| OBSERVATIONS: | ||||||
| 09-4-2023 | 2 adults | cach type & river gull type on lookout. No eggs, but nest is ready. | ||||
| 26-4-2023 | eggs: | 3x egg, measured. Water test: | A: floating - halfway | |||
| B: 80 - tip bottom | ||||||
| C: floating - 1mm | ||||||
| 11-5-2023 | pulli: | 1 chick ringed, 1 egg hatching, 3rd egg still complete. | ||||
| 18-5-2023 | pulli: | 2 chicks present (R-8K and unringed one, which is now ringed) 1 rotten egg. | ||||
| 18-6-2023 | pulli: | 2x fledged from nest (1x rotten egg). | ||||
| 25-6-2023 | pulli: | r-8K present. | ||||
below: Caspian Gull cachinnans 8.K 1CY, June 25 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 8.K 1CY, May 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.
