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 025
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 025 positioned at breakwater 2 high on the top, "nest near the wooden beam, which is the lookout".
- ID 2020 certain, Caspian Gull cachinnans; one partner 4CY with obvious sub-adult patterns, other partner probably 5CY.
| location | April 27th, 2020: nest location. | April 27th, 2020: 2 eggs clutch. | |
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| partner 1 | May 7th, 2020: cachinnans 4CY? | May 7th, 2020: cachinnans 4CY? | May 7th, 2020: cachinnans 4CY? |
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| partner 2 | May 7th, 2020: cachinnans. | . | . |
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| pulli | May 21st, 2020: pullus b[F|A]. | May 21st, 2020: pullus b[F|B]. | . |
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Visits and data.
| datum: | egg no: | width (mm) | length (mm) | volume (cm3): | |
| 27-04-2020 | A | 45,3 | 70,3 | 72,64 | 2 eggs in the nest. Sub-adult Caspian at the lookout. |
| 27-04-2020 | B | 47,5 | 68 | 77,25 | |
| sum nest: | -- | ||||
| 21-05-2020 | pulli | Nest empty. Two chicks close-by, ringed b[F|A] & b[F|B]. | |||