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 042
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 042-2021 discovered late in season (May 28th, 2021). Dam 2, between nest 15 and nest 48 (was nest 15B). On top of bunch of branches, which appears to be an old Spoonbill nest.
- Nest 042-2024 at dam 2, between nest 15 and nest 48 (was nest 15B). In 2024: 3 eggs, letters KLM: left to right are nest 48 (M), nest 42 (L) & nest 15 (K).
- ID uncertain: both partners unknown.
- ID uncertain: both partners unknown.
| location | May 28th, 2021: nest in background. | May 13th, 2021. | . |
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| partner 1 | May 14 2024:H Herring Gull. | . | . |
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| pullus | May 28th, 2021: b[S|2]. | June 18 2024: Herring Gull chick b/w-AS. | June 18 2024: Herring Gull chick b/w-A+. |
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| food | June 18 2024: food b/w-AS is fish. | . | . |
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Visits and data 2021.
| date: | ||||||
| metal | tibia ring | mass | ||||
| 28-05-2021 | pull | .5559401 | b-S|2 | 72 | ||
| 08-06-2021 | Nest on bunch of branches abandoned. Maybe parents and chick moved to the northside of the dam? | |||||
| 26-6-2021 | Just Spoonbills present. | |||||
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: | |
| 042-2024 | teus | teus | 67,4 | 48,6 | 80,16 | 67,3 | 49,2 | 82,02 | 65,4 | 49,7 | 81,34 | 243,52 | |
| # eggs | A-egg | hatch | # ringed chicks | # all chicks | # fledged chicks | comments | |||||||
| 3 | 02-5-2024 | 31-5-2024 | |||||||||||
| dam: | dam 2 central | ||||||||||||
| location: | was 42 under prunus, between 15 and 48 | ||||||||||||
| parents? | new? | ||||||||||||
| ring pulli: | 4 June | ||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale |
| 04-06-2024 | b/w-AS | .5631150 | L / 42 | teus | 1CY | 217 | 64,3 | ||||||
| 04-06-2024 | b/w-AT | .5631001 | L / 42 | teus | 1CY | 243 | 66,3 | ||||||
| 18-06-2024 | b/w-AS | .5631150 | L / 42 | teus | 1CY | 169 | 658 | 93,0 | |||||
| 18-06-2024 | b/w-A+ | .5631028 | nest 42 | teus | 1CY | 137 | 594 | 86,8 | |||||
| OBSERVATIONS: | |||||||||||||
| 07-05-2024 | eggs: | 3 eggs, measured. | |||||||||||
| nest: | complicated locations 3x nests with 3 eggs, letters KLM: left to right are nest 48 (M), nest 42 (L) & nest 15 (K) | ||||||||||||
| 14-05-2024 | nest: | 3 eggs. | |||||||||||
| adult: | Herring Gull. | ||||||||||||
| 04-06-2024 | chicks: | 2x ringed. | |||||||||||
| 18-06-2024 | chicks: | CONTROLL: b/w-AS measured again. | |||||||||||
| 1x ringed: b/w-A+. | |||||||||||||
| food: | fish bolus from b/w-AS. | ||||||||||||
Visits and data 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 |
042
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teus | 70,6 | 49,3 | 68,9 | 48,5 | 69 | 47 | 3 | |||||
| dam: | dam 2 | ||||||||||||
| location: | was 42-2024 under prunus. Middle nest left of 17. Letter = white L on block in line K-L-M.
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OBSERVATIONS:
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| 16-03-2025 | adult | male cachinnans & female Herring on blocks in front of nest 48 (15B, or nest M).
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| 23-04-2025 | nest | 3 eggs, measured.
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| 01-05-2025 | adult | Herring Gull at nest.
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