Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Albert de Jong
Leon Kelder
Roland-Jan Buijs
Thijs Horst
Merijn Loeve
Mars Muusse
Cachinnans - nest Lelystad b/w-AA (276)
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 276 positioned on artificial breakwater 2 at bend, north side, 25 meters from 'Blocks east'. Nest called b/w-AA, after a bird trapped here.
- Certainty on ID in 2024, one is Herring Gull type (trapped in 2024) & one is Caspian Gull cachinnans.
| nest | April 23rd, 2024: full clutch (3 eggs). | April 23rd, 2024: full clutch (3 eggs). | . |
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| partner 1 | April 23rd, 2024: female Herring Gull b/w-AA. | April 23rd, 2024: female Herring Gull b/w-AA. | April 23rd, 2024: female Herring Gull b/w-AA. |
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| partner 2 | April 23rd, 2024: male hybrid type. | April 23rd, 2024: male hybrid type. | April 23rd, 2024: male hybrid type. |
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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: | ||
| w-A|A (276) | teus | cach type | 75,4 | 52,6 | 105,04 | 76 | 52 | 103,47 | 74,7 | 52,4 | 103,27 |
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| 2024 | # eggs | A-egg | hatch | # ringed chicks | # all chicks | # fledged chicks | comments | |||||||
| 3 | 17-4-2024 | 15-5-2024 | ||||||||||||
| dam: | dam 2 east | |||||||||||||
| location: | 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 | 23-4-2024 | b/w-AA | .5625289 | nest 276 dam 2 | ZM | F | >4CY | 412 | 125,5 | 51,1 | 66,6 | 19,0 | 6 |
| OBSERVATIONS: | ||||||||||||||
| 23-4-2024 | eggs: | 3 eggs, measured. | ||||||||||||
| adult: | trapped Herring Gull. | |||||||||||||
| 14-05-2024 | eggs: | 3 eggs, small cracks, almost hatching (within 2 days). | ||||||||||||
| adult: | Attempt to trap partner, failed. | |||||||||||||