Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Thijs Horst
Leon Kelder
Mars Muusse
Caspian Gull cachinnans hybrid(?) 7.L adult, May 03 2023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
Red tibia ring r[7.L] and metal NLA 6.214.904, ringed as breeding adult male Larus cachinnans-type at nest 62 on May 03 2023 in colony Lelystad, the Netherlands. Ringer: Roland-Jan Buijs.
Recoveries:
21-07-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
ID uncertain for nest 62. Difficult to monitor exact relations in this cluster of nests.
| 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 | male 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 male cach-type: 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. | |
Visits and data 2024.
| NEST code | parent 1 | parent 2 | A_length | A_width | A_volume | B_length | B_width | B_volume | C_length | C_width | C_volume | TOTAL NEST: | ||
| r-7L / 62 | cach | cach r-7L | 71 | 50,9 | 92,62 | 67,6 | 52 | 92,03 | 66,5 | 50,3 | 84,71 |
|
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| # eggs | A-egg | hatch | # ringed chicks | # all chicks | # fledged chicks | comments | ||||||||
| 3 | 10-4-2024 | 7-5-2024 | ||||||||||||
| dam: | dam 1 south | |||||||||||||
| location: | Is nest 62-2021/2023. r-7L again at spot 62, same as 2023. | |||||||||||||
| parents? | same as 2020-23. | |||||||||||||
| ring pulli: | 11-May | |||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale | 26-4-2024 | r-7L | .6214904 | nest 62 dam 1 | PONT | M | >4CY | 461 | 1234 | 136,7 | 59,0 | 74,5 | 19,0 | 7 |
| OBSERVATIONS: | ||||||||||||||
| 12-4-2024 | eggs: | 2 eggs, measured. | ||||||||||||
| 21-4-2024 | eggs: | 3 eggs, measured. | ||||||||||||
| nest: | cluster again: 60, 69, PAM0, n-F|+, and 2 Herrings to follow soon. | |||||||||||||
| 26-4-2024 | adults: | CONTROL: trapped male, rings not replaced, remains r-7L | ||||||||||||
below: Caspian Gull cachinnans hybrid(?) 7.L adult, May 03 2023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
Note: limited black on P5, and quite some black on innerweb of P10.
below: Caspian Gull cachinnans hybrid(?) 7.L adult, May 03 2023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
Note: short and high bill, limited black on P5, and quite some black on innerweb of P10.
