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 092
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 092 positioned on artificial breakwater 1 west, opposite yacht harbour, 30 mtr west of yellow sign 2,5 (nest b/w-AJ and b/w-AK). New nest 2024, late, found on June 04 2024.
- Certainty on ID in 2024, both are immature Caspian Gull cachinnans.
| partner 1 | June 04 2024: Caspian Gulls sub-adult. | June 04 2024: Caspian Gull sub-adult. | . |
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| partner 2 | June 04 2024: Caspian Gull sub-adult. | June 04 2024: Caspian Gull sub-adult. | June 04 2024: Caspian Gull sub-adult. |
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| pullus | June 04 2024: chick g-M|G. | June 04 2024: chick g-M|G. | June 04 2024: chick g-M|H. |
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| food | June 04 2024: fish = Roach. | . | . |
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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: | |
| cach | cach | ||||||||||||
| 155-2024 | # eggs | A-egg | hatch | # ringed chicks | # all chicks | # fledged chicks | comments | ||||||
| dam: | dam 1 west | ||||||||||||
| location: | near Elderberry, 30 mtr W of sign 2,5. Code 92 sprayed on tarmac. | ||||||||||||
| parents? | New | ||||||||||||
| ring pulli: | |||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale |
| 04-06-2024 | g-M|G | .5631140 | 92 | PONT | 1CY | 143 | |||||||
| 04-06-2024 | g-M|H | .5631141 | 92 | PONT | 1CY | 122 | |||||||
| OBSERVATIONS: | |||||||||||||
| 04-06-2024 | adult: |
2x Caspian Gull immatures. Location was already suspicious weeks ago, but believed to be socialising birds. | |||||||||||
| pullus: | 2x ringed. | ||||||||||||
| food: | Roach type. | ||||||||||||