Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Albert de Jong
Leon Kelder
Roland-Jan Buijs
Thijs Horst
Merijn Loeve
Mars Muusse
Cachinnans - Lelystad g-U|9 (Hamster 2026)
General remarks:
- Eggs: Volume measured by Stonehouse (1964) and Spaans & Spaans (1975), which make comparison possible with data from Texel (Camphuysen pers comm 16.04.2020).
- Nest "Hamster": positioned on artificial breakwater 2 west, 8 mtr N of nest Blue Rope. Nest entrance is from N side of dam.
- ID in 2026. Trapped adult female Caspian Gull, now g-U|9.
| nest | May 03 2026: nest Hamster. | May 03 2026: nest 3 eggs. | . |
 |
 |
. | |
| partner 1 | May 05 2026: adult female g-U|9. | May 05 2026: adult female g-U|9. | . |
 |
 |
. | |
| partner 2 | . | . | . |
| . | . | . |
Visits and data data g-U|9 2026.
| 2026 | 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 | |
| Hamster | cach | ? | 68,5 | 50 | 66,6 | 49 | 69,1 | 50,6 | 3 | |||||
| ringed: | ||||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | tarsus | head+ bill | bill | gonys | mass | greyscale | |
| 05-05-2026 | G-U|9 | .5646651 | Hamster | PONT | F | >4CY | 438 | 68,3 | 124,8 | 59,1 | 18 | 769 | 26B02570 | |
| 10-05-2026 | G-U|9 | .5646651 | CONTROLL | |||||||||||
OBSERVATIONS:
|
||||||||||||||
| 03-03-2026 | nest | 3 eggs | ||||||||||||
| location | New: Hamster placed on N-side of dam 2. | |||||||||||||
| parents | Breeder is Caspian Gull. Partner not present. | |||||||||||||
| 05-05-2026 | nest | 3 eggs. | ||||||||||||
| parents | Caspian Gull trapped, now g-U|9. | |||||||||||||
| food | Roach | |||||||||||||
| 10-05-2026 | parents | Attempt for trapping partner Caspian Gull, failed. Instead: g-U|9. | ||||||||||||