Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Thijs Horst
Leon Kelder
Mars Muusse
Argenteus - nest Lelystad b/w-AA (276-2024)
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 b/w-A|A positioned on dam 2 eastern section, but west of blocks. Location of 276, N side of dam, near bend, 20 mtr W of 46 (blocks).
- ID certain in 2024: female argenteus b/w[A|A] and male Caspian Gull type.
| location | April 23 2024: nest b/w-AA: 3 eggs. | April 23 2024: nest b/w-AA: 3 eggs. | May 31 2024: nest. |
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| partner 1 | April 23 2024: trapped b/w-AA, incubating 3 eggs. | April 23 2024: trapped b/w-AA, incubating 3 eggs. | April 23 2024: trapped b/w-AA, incubating 3 eggs. |
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| partner 2 | June 18th, 2024: male cachinnans-type. | June 18th, 2024: male cachinnans-type. | . |
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| chicks | May 31 2024: 1x chick dead. | May 31 2024: pullus g[C|+]. | May 31 2024: pullus g[C|=]. |
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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: | |
| b/w-A|A | teus | cach type | 75,4 | 52,6 | 105,04 | 76 | 52 | 103,47 | 74,7 | 52,4 | 103,27 | 311,78 | |
| 276-2024 | # eggs | A-egg | hatch | # ringed chicks | # all chicks | # fledged chicks | comments | ||||||
| 3 | 17-4-2024 | 15-5-2024 | |||||||||||
| dam: | dam 2 east | ||||||||||||
| location: | Location was 276: N side of dam, near bend, 20 mtr W of 46 (blocks). | ||||||||||||
| parents? | new. | ||||||||||||
| ring pulli: | 21-May | ||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale |
| 31-05-2024 | g-C|+ | .5631133 | b/w-AA | cach x teus |
1CY | ||||||||
| 31-05-2024 | g-C|= | .5631134 | b/w-AA | cach x teus | 1CY | ||||||||
| OBSERVATIONS: | |||||||||||||
| 23-04-2024 | eggs: | 3 eggs, measured. | |||||||||||
| adult: | trapped female Herring Gull. | ||||||||||||
| 31-05-2024 | chicks: | 2x ringed. Unringed chick died >7 days ago. | |||||||||||
| 18-06-2024 | adult: | b/w-AA and cach-type male. | |||||||||||