Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans hybrid 7|3 1CY, May 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.
Green tibia ring r[7|3] and metal NLA 5.556.422, ringed as pullus Larus cachinnans hybrid at nest 62 on May 03 2023 in colony Lelystad, the Netherlands. Ringer: Roland-Jan Buijs.
ID uncertain for nest 62. Difficult to monitor exact relations in this cluster of nests.
Recoveries:
18-05-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
02-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
| 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 ? | 62-2023 | 70,1 | 51,2 | 92,52 | 70,3 | 51,8 | 94,98 | 67,9 | 51,7 | 91,38 | 278,88 | same as 2022 |
| ring pulli: -- | laying A egg: -- | hatch A egg: -- | ||||||||||
| catch: | date: | metal: | darvic: | mass: | wing: | head+bill: | bill: | gonys: | greytone: | |||
| adult | 03-05-2023 | 6214904 | r-7.L | nn | 466 | 136 | 59,7 | 21,6 | 6 | female cach | ||
| pullus | 18-05-2023 | 5556422 | G-7|3 | 116 | 52,6 | |||||||
| 62-2023 | ||
| dam: | dam 1 west | |
| location: | Is nest 62-2021/22. From cluster 60-62-63. | |
| breeders: | cach x ? | |
| OBSERVATIONS: | ||
| 09-04-2023 | nest: | no eggs, nest is ready. |
| 22-04-2023 | nest: | 3 eggs, water test = tip bottom 90 degrees; tip bottom 50 degrees, tip bottom 45 degrees. |
| 03-05-2023 | adult: | trapped female cach: r-7.L. |
| eggs: | 3 eggs. | |
| 18-05-2023 | eggs: | 1 rotten egg. |
| pullus: | 1 chick ringed is G-7|3, 1 chick dead in nest. | |
below: Caspian Gull cachinnans hybrid 7|3 1CY, May 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.
