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 004
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 004 positioned on artificial breakwater 1 at "Blocks". Location is "Nest Roosje 2", only visible on North side, 12 meters east of where blocks end (nest 168), at bend of the dam.
- Uncertainty on ID in 2024, one is Caspian Gull cachinnans. Other is either Herring or Caspian. Slightly latre nest (April 25 2024).
| nest: | April 30 2024: 2 eggs. One is damaged. | . | . |
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| parents: | April 30 2024: Herring Gull & Caspian Gull. | April 30 2024: Herring Gull. | April 30 2024: Caspian Gull. |
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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: | |
| 004-2024 | # eggs | A-egg | hatch | # ringed chicks | # all chicks | # fledged chicks | comments | ||||||
| dam: | dam 1 Blocks | ||||||||||||
| location: | Nest "Roosje 2". 12 mtr east of Rozebottel, east of tree, at bend in dam. | ||||||||||||
| parents? | New | ||||||||||||
| ring pulli: | |||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale |
| OBSERVATIONS: | |||||||||||||
| 23-4-2024 | adults: | 4 adult Caspians and some resting Herrings. | |||||||||||
| 26-4-2024 | nest: | adult Caspian Gull is incubating. | |||||||||||
| 30-4-2024 | eggs: | 2 eggs, measured. Damaged egg kept in nest (adults have to decide what to do). | |||||||||||
| adults: | what seems to be left: Herring Gull guarding, Caspian Gull incubating. Is the male a Herring here??? | ||||||||||||
| 14-05-2024 | adults: | Herring Gull guarding, Caspian Gull incubating. | |||||||||||