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 De Kreupel KK 21
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 on island "C". Nest coded "C02" in season 2021, but renamed after trapping adult, now coded as ring code.
| location | April 9th, 2021. | April 9th, 2021: 1 egg. | April 9th, 2021: 1 egg. |
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| partner 1: | April 23rd, 2021: adult r-K.K (more images). | . | . |
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| pulli: | May 14th, 2021: pullus p[FP]. | May 14th, 2021: pullus p[F0]. | May 14th, 2021: pullus p[FN]. |
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Visits and data.
| Date: | details: | ||||||
| egg no: | width (mm): | length (mm): | volume (cm3): | ||||
| 9-4-2021 | 1 egg in nest, cold. https://waarneming.nl/observation/210432243/ |
A egg | 50.0 | 72.5 | |||
| 23-4-2021 | 3 eggs in nest. | egg no: | width (mm): | length (mm): | volume (cm3): | ||
| B egg | 51.6 | 74.0 | |||||
| C egg | 49.1 | 68.9 | |||||
| A egg | 50.0 | 72.2 | |||||
| metal: | tibia: | wing: | head + bill: | bill: | |||
| Adult male trapped at nest. | NLA 6.211.444 | Red-K.K | 459.0 | 124.2 | 53.8 | ||
| mass: | tarsus: | moult score: | bill height: | grey scale | Swob | ||
| 994 | 69.5 | 10x0 | 18.0 | 5.5 | 1086 | ||
| 14-5-2021 | 3 chicks in nest. | metal: | tibia: | mass (gr): | head + bill: | tarsus: | |
| https://waarneming.nl/observation/214661812/ | NLA 5.556.710 | Pale FN | 115 | 57.3 | 33.8 | ||
| NLA 5.556.711 | Pale F0 | 223 | 67.4 | 43.6 | |||
| NLA 5.556.712 | Pale FP | 211 | 67.6 | 44.4 | |||
| 20-5-2021 | 3 chicks in nest. | metal: | tibia: | mass (gr): | head + bill: | wing: | |
| 5556710 | Pale FN | 321 | 72.2 | 56.5 | |||
| 5556711 | Pale F0 | 517 | 85.2 | 94.5 | |||
| 5556712 | Pale FP | 506 | 84.0 | 90.0 | |||