Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Coordinators:
Albert de Jong
Leon Kelder
Roland-Jan Buijs
Thijs Horst
Merijn Loeve
Mars Muusse
Cachinnans - nest Lelystad y-P:AM0 & g-A|E
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 PAM0 positioned at breakwater 1, centre of large blocks east of T split. Parents has look-out with loads of shit.
- ID certain in 2024: female Caspian Gull cachinnans & male is 5CY Caspian Gull y[P:AM0], Female trapped in April 2024, now g-A|E.
| nest | April 12th, 2024: 2 eggs in cluster. | April 21st, 2024: 3 eggs (full clutch). | . |
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| partner 1 | March 8th, 2024: y[P:AM0]. | March 19th, 2024: y[P:AM0] & unringed partner. | March 19th, 2024: y[P:AM0]. |
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| partner 2 | March 19th, 2024: y-P:AM0 & unringed partner. | March 31st, 2024: unringed partner. | April 26 2024: unringed partner now g-A|E. |
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| partner 2 | April 4th, 2025: unringed partner. | April 4th, 2025: unringed partner and y-P:AM0. | . |
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| chicks | May 31 2024: chick g-C|Z. | May 31 2024: chick g-C|0. | May 31 2024: chick g-C|1. |
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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: | |
| P:AM0 & g-A|E | cach | cach | 73,6 | 49 | 88,98 | 70 | 50,3 | 89,17 | 68,5 | 48,5 | 81,13 | 259,28 | |
| 2024 | # eggs | A-egg | hatch | # ringed chicks | # all chicks | # fledged chicks | comments | ||||||
| 3 | 10-4-2024 | 6-5-2024 | |||||||||||
| dam: | dam 1 west | ||||||||||||
| location: | Is nest 63-2021/2023. The west nest in the complex. | ||||||||||||
| parents? | y-P:AM0 is new breeder. | ||||||||||||
| ring pulli: | 11-May | ||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale | 26-04-2024 | g-A|E | .5625294 | nest PAM0 | PONT | F | >4CY | 443 | 1075 | 126,3 | 53,0 | 66,7 | 18,1 | 5 |
| 31-05-2024 | g-C|Z | .5631125 | y-P:AM0 g-A|E | PONT | 1CY | ||||||||
| 31-05-2024 | g-C|0 | .5631126 | y-P:AM0 g-A|E | PONT | 1CY | ||||||||
| 31-05-2024 | g-C|1 | .5631127 | y-P:AM0 g-A|E | PONT | 1CY | ||||||||
| 04-06-2024 | g-C|Z | .5631125 | y-P:AM0 g-A|E | PONT | 1CY | 220 | 809 | 105,7 | |||||
| OBSERVATIONS: | |||||||||||||
| 08-03-2024 | adult: | y-PAM0. | |||||||||||
| 31-03-2024 | adults: | both parents present. | |||||||||||
| 12-04-2024 | eggs: | 1 egg, measured. | |||||||||||
| 21-04-2024 | eggs: | 3, measured. | |||||||||||
| nest: | cluster again: 60, 69, PAM0, n-F|+, and 2 Herrings to follow soon. | ||||||||||||
| 26-04-2024 | adult: | adult female trapped at nest, now g-A|E. | |||||||||||
| food: | Perch vomit when adult trapped. | ||||||||||||
| 02-05-2024 | eggs: | 3 eggs. | |||||||||||
| 05-05-2024 | nest: | 3 eggs, not measured. | |||||||||||
| 31-05-2024 | chicks: | 3x ringed. | |||||||||||
| 04-06-2024 | chick: | g-C|Z present. measured. | |||||||||||
| 18-06-2024 | chicks: | g-C|0 & g-C|1 dead. | |||||||||||
| chick: | CONTROLL: g-C|Z. | ||||||||||||