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Coordinator: Albert de Jong Merijn Loeve Roland-Jan Buijs Thijs Horst Leon Kelder Mars Muusse |
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location | May 4th, 2022: 3 eggs at nest. | May 4th, 2022: nest location. | May 4th, 2022: y-X71A at nest. |
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partner 1 | May 4th, 2022: y-X71A at nest. | May 4th, 2022: y-X71A at nest. | May 1st, 2022: y-X71A with possible Herring Gull partner. |
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April 11th, 2022: male is hybrid Caspian Gull y-X71A. | April 15th, 2022: male is hybrid Caspian Gull y-X71A. | April 27th, 2022: male is hybrid Caspian Gull y-X71A. | |
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April 27th, 2023: 6CY male is hybrid Caspian Gull y-X71A. | April 9th, 2023: 6CY male is hybrid Caspian Gull y-X71A. | . | |
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partner 2 | April 09 2023: partner is female Herring Gull. | April 09 2023: partner is female Herring Gull. | . |
food | May 30th, 2022: food is Eel. | . | . |
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Visits and data:
Estimation egg laying: A-egg = April 26 2022. Estimating hatching = May 24 2022.
date | |||||||
27-04-2022 | Again, y-X71A standing high on dam, guarding the area. | ||||||
Nest located here with 1 egg. Label: nest 119Z (part of control group Herring Gulls). | |||||||
1 egg | egg no: | width (mm) | length (mm) | volume (cm3): | water test on April 27th: | ||
A egg | 51,2 | 71,2 | -- | 00 - tip on bottom | |||
01-05-2022 | y-X71A standing high on dam, about 25 meters from nest 61, near 119Z. y-X71A classified as male cachinnans hybrid.. | ||||||
04-05-2022 | y-X71A steps from nest, was breeding. Code 119Z sprayed near nest. | ||||||
3 eggs | egg no: | width (mm) | length (mm) | volume (cm3): | water test on May 4th: | ||
A egg | 51,2 | 71,3 | -- | -- | |||
B egg | 47,7 | 68,8 | -- | -- | |||
C egg | 47,5 | 65,8 | -- | -- | |||
09-05-2022 | 3 eggs. | ||||||
17-05-2022 | 3 eggs. | ||||||
22-05-2022 | 3 eggs. First crack in shell. Decided not to try to trap adult at nest. y-X71A present. | ||||||
30-05-2022 | 1 chick present: chick r-5+ (which belongs to nest 117Z). No chicks of nest 119Z found in vegetation. | ||||||
food: large Eel (25 cm's) next to nest. No sign of adults. | |||||||
In 2022 no chicks ringed in this nest and no data on fledging. |
egg sizes & volume 2023 | ||||||||||||
SPECIES | NEST | A_length | A_width | A_volume | B_length | B_width | B_volume | C_length | C_width | C_volume | TOTAL NEST: | known parents? |
hybrid x teus | X71A | 73,4 | 51 | 96,12 | 73,2 | 50,8 | 95,11 | 70,8 | 48,4 | 83,51 | 274,74 | same as 2022 |
ring pulli: 20-mei | laying A egg: -- | hatch A egg: -- | ||||||||||
X71A | 122-2023 | |
dam: | dam 1 west | |
location: | Coded 122 on tarmac, nest is next to sprayed white spot | |
breeders: | hybrid x teus | |
OBSERVATIONS: | ||
05-04-2023 | adult: | yX71A present. |
09-04-2023 | nest: | seems ready. |
adult: | Male is yX71A, female is teus. Guarding on top of dam. | |
22-04-2023 | nest: | 3 eggs, watertest: tip at bottom 70, 50, 20 degrees respectively. |
27-04-2023 | adult: | Male is yX71A, female is argenteus. Guarding on top of dam. |
03-05-2023 | adult: | Cage on nest 119 border tarmac-vegetation (was location 119-2022). Now trapped a LBBG here. |
X71A moved to location 122-2022? In retrospect: yes. | ||
25-06-2023 | adult: | X71A present on dam, unknown if he has any chicks. |
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: | |
119-2024 | teus | teus | 65,1 | 48,6 | 77,42 | 67,5 | 47,7 | 77,33 | 0,00 | ||||
# eggs | A-egg | hatch | # ringed chicks | # all chicks | # fledged chicks | comments | |||||||
2 | |||||||||||||
dam: | dam 1 south | ||||||||||||
location: | dam 1 western section, nest 119-2023, was y-X71A in 2023 | ||||||||||||
parents? | one same as 2023? | ||||||||||||
ring pulli: | June 03? | ||||||||||||
date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale |
OBSERVATIONS: | |||||||||||||
05-05-2024 | eggs | 2x, measured. | |||||||||||