Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans F|U 1CY, May 21 2020, Lelystad, the Netherlands. Picture: Merijn Loeve.
Black tibia n[F|U], ringed as pullus on May 21 2020 at nest 29 in colony Lelystad, the Netherlands.
ID certain, both Caspian Gull cachinnans.
5 eggs, one Lesser Black-backed Gull very aggressive and close to nest. The 2nd partner responsible for the extra eggs???
On September 11 2020, while doing the last colony check after all birds left, we found the tibia bone with this ring in the nest. Ergo: exit n[F|U].
| datum: | egg no: | width (mm) | length (mm) | volume (cm3): | water test on April 27th: | |
| 07-05-2020 | A | 51,3 | 72,8 | 96,46 | 90 - floating, 7mm above surface | 5 eggs in the nest, both partners cachinnans, with LBBG close by. |
| 07-05-2020 | B | 51,9 | 71,8 | 97,38 | 90 - floating, 7mm above surface | |
| 07-05-2020 | C | 46,3 | 65 | 70,16 | 90 - off bottom, halfway | |
| 07-05-2020 | D | 51,7 | 73,9 | 99,45 | 90 - floating, 5mm above surface | |
| 07-05-2020 | E | 50 | 65,3 | 82,20 | 90 - tip on bottom | |
| sum nest: | -- | |||||
| 21-05-2020 | -- | Egg A, B, C rotten but intact. One pullus, ringed n[F|U]. | ||||
| 11-09-2020 | -- | Rotten egg in nest. Tibia bone + ring of n[F|U]. | ||||
Caspian Gull cachinnans F|U 1CY, May 21 2020, Lelystad, the Netherlands. Picture: Merijn Loeve.
Caspian Gull cachinnans F|U 1CY R.I.P., September 11 2020, Lelystad, the Netherlands. Picture: Mars Muusse.
