Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Albert de Jong
Leon Kelder
Roland-Jan Buijs
Thijs Horst
Merijn Loeve
Mars Muusse
Argenteus - nest Lelystad 023
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 023 positioned on artificial breakwater 1 blocks. Location is 10 mtr east of PU60, with wooden branch and Bottle Carvan Cevitan.
- Certainty on ID in 2024, Herring Gull argenteus.
- Positive ID in 2025, Herring Gull argenteus. Nest exactly the same, again with wooden branch and Bottle Carvan Cevitan.
| nest | April 21st, 2024: location nest 23. | April 21st, 2024: location nest 23. | April 21st, 2024: 3 eggs clutch. |
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| nest | April 23 2025: 3 eggs (full clutch). | April 23 2025: 3 eggs (full clutch). | . |
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| partner 1 | May 14th, 2024: Herring Gulls. | April 21st, 2024: Herring Gull. | April 23rd, 2024: Herring Gull. |
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| partner 1 | April 1st, 2025: Herring Gull. | . | . |
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| chicks | June 4th, 2024: b/w-AM. | June 4th, 2024: b/w-AR. | July 09 2025: B/R-KD, B/R-KE, B/R-KF. |
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| chicks | June 30 2025: chick B/R-KF. | . | . |
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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: | |
| teus | 72,8 | 48,2 | 85,16 | 72,8 | 48,7 | 86,93 | 68,4 | 47,3 | 77,05 | 249,14 | |||
| 023-2024 | # eggs | A-egg | hatch | # ringed chicks | # all chicks | # fledged chicks | comments | ||||||
| 3 | 15-4-2024 | 10-5-2024 | |||||||||||
| dam: | dam 1 blocks | ||||||||||||
| location: | new, 10 mtr east of PU60, with wooden branch and Bottle CarvanCevitan. | ||||||||||||
| parents? | New? | ||||||||||||
| ring pulli: | 14-May | ||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale |
| 14-05-2024 | .5631191 | nest 23 de stok | TEUS | 1CY | 69 | ||||||||
| 14-05-2024 | .5631192 | nest 23 de stok | TEUS | 1CY | 69 | ||||||||
| 04-06-2024 | b/w-AM | .5631191 | nest 23 de stok | TEUS | 1CY | 159 | 658 | 89,8 | |||||
| 04-06-2024 | b/w-AR | .5631192 | nest 23 de stok | TEUS | 1CY | 149 | 609 | 86,5 | |||||
| OBSERVATIONS: | |||||||||||||
| 21-04-2024 | eggs: | 3 eggs, measured. | |||||||||||
| adult: | Herring at nest, defending. | ||||||||||||
| 07-05-2024 | eggs: | 3x. | |||||||||||
| 14-05-2024 | chicks: | 2x ringed, only metal. Chicks 1 day old. Ringed as L argentatus argenteus. | |||||||||||
| eggs: | 1x hatching. | ||||||||||||
| 04-06-2024 | chicks: | 2x ringed, darvic added. | |||||||||||
| 18-06-2024 | nest: | b/w-AM present & 1x parent Herring Gull. | |||||||||||
Visits and data 023-2025.
| 2025 | parent 1 | parent 2 | A_length | A_width | A_volume | B_length | B_width | B_volume | C_length | C_width | C_volume | TOTAL NEST:
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# eggs | |
| 023 | teus | 72,5 | 48,1 | 69,7 | 49 | 65,8 | 46 | 3 | ||||||
| dam: | dam 1 blocks
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| location: | blocks east part, nest with branch. This year brach + container "Carvan cevitan"
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| ouders: | same as 2024?
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| ring pulli: | ||||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale | |
| 14-06-2025 | B/R-KE | 6254590 | nest 23 | ZM | pullus | 490 | ||||||||
| 14-06-2025 | B/R-KD | 6254591 | nest 23 | ZM | pullus | 383 | ||||||||
| 14-06-2025 | B/R-KF | 6254592 | nest 23 | ZM | pullus | 652 | ||||||||
OBSERVATIONS:
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| 23-04-2025 | eggs | 3 eggs, measured.
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| 28-04-2025 | eggs | 3 eggs | ||||||||||||
| 13-05-2025 | eggs | 3 eggs | ||||||||||||
| 14-06-2025 | chicks | 3 chicks ringed. b/r-KE found dead in colony.
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