Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Thijs Horst
Leon Kelder
Mars Muusse
Cachinnans - nest Lelystad 228
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 228 positioned on dam 2, west next to blue sign VHF20. Nest is part of "Herring Gull control group".
- ID uncertain in 2022: one is argenteus, other parent probably argenteus as well.
| location | April 29th, 2022: location of nest. | April 29th, 2022: location of nest. | April 29th, 2022: 3 eggs. |
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| partner 2 | May 1st, 2022 adult argenteus breeding. | May 4th, 2022 adult argenteus is partner 1. | May 1st, 2022 adult argenteus is partner 1. |
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Visits and data.
| nest 228Z-2022 | date A egg: April 15 | hatch A egg: May 13 | ring chicks: May 22 | ||||
| 29-04-22 | 3 eggs | A egg | 67 | 47,9 | tip bottom - 90 gr | 2 mtr N of blue sign VHF20 westernmost dam 2 | |
| B egg | 67,3 | 48,5 | tip bottom - 90 gr | only visible from N side | |||
| C egg | 64 | 47,1 | tip bottom - 90 gr | ||||
| 01-05-22 | adult Herring Gull breeding. | ||||||
| 09-05-22 | 3 eggs | ||||||
| 17-05-22 | 2 eggs | ||||||
| 1 pullus | |||||||
| 21-06-22 | 1 pullus unringed | ||||||