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Coordinator: Albert de Jong Merijn Loeve Roland-Jan Buijs Thijs Horst Leon Kelder Mars Muusse |
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location | April 19th, 2022: nest y-X540 behind nest 17. | April 9th, 2022: nest location with pair Caspian Gull. | April 26th, 2023: exact same nest location. |
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nest | April 29th, 2022: nest location marked "223". | April 29th, 2022: 3 eggs. | April 26th, 2023: 2 eggs. |
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partner 1 | May 4th, 2022: female is 5CY cachinnans y-X540. | May 4th, 2022: female is 5CY cachinnans y-X540. | May 4th, 2022: female is 5CY cachinnans y-X540. |
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partner 2 | May 1st, 2022: male is Caspian Gull. | May 4th, 2022: male is Caspian Gull. | May 4th, 2022: male is Caspian Gull. |
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pulli | May 30th, 2022: pullus r-6.V. | July 17th, 2022: fledged r-6.V. | July 17th, 2022: fledged r-6.U. |
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June 18th, 2023: g-8|B, fledged eventually. | July 18th, 2023: fledged g-8|D. | July 8th, 2023: fledged g-8|E. | |
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Visits and data.
date | |||||||
19-04-2022 | behind nest 17, landing Caspian Gull and Caspian (hybrid?) y-X540. Best viewed from north side. | ||||||
29-04-2022 | 3 eggs | egg no: | width (mm) | length (mm) | volume (cm3): | water test on April 29th: | |
A egg | 49,8 | 72,5 | -- | 50 - tip on bottom | |||
B egg | 48,3 | 71,4 | -- | 90 - tip on bottom | |||
C egg | 48,8 | 71,6 | -- | 65 - tip on bottom | |||
04-05-2022 | 2 adults at nest, including y-X540. | ||||||
09-05-2022 | 3 eggs. | ||||||
17-05-2022 | 2 eggs and 1 chick. B egg and C egg are hatching. | ||||||
pullus ringed with metal NLA .5625133 | |||||||
30-05-2022 | 2 chicks | metal | darvic | Mass | Wing | Head+Bill | Bill |
.5625172 | r-6U | 421 | 70 | 79,1 | 33,7 | ||
.5625133 | r-6V | 410 | 84 | 78,5 | 28,2 | ||
3rd chick is dead in the nest. | |||||||
02-06-2022 | adult y-X540 present and aggressive. | ||||||
17-06-2022 | 3 ringed chicks are standing in nest 17, club of nest 17 together with nets 223 most likely. | ||||||
21-06-2022 | both parents present. | ||||||
28-06-2022 | adult y-X540 present. | ||||||
12-07-2022 | adult male present with chick r-6.U. | ||||||
17-07-2022 | adult male present with both chicks r-6.U & r-6.V. |
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? |
cach x cach | 223-2023 | 77,1 | 50,4 | 98,61 | 73,9 | 47 | 82,19 | 71,3 | 47,7 | 81,68 | 262,48 | ? |
ring pulli: May 28 | laying A egg: April 23 | hatch A egg: May 21 | ||||||||||
catch: | date: | metal: | darvic: | mass: | wing: | head+bill: | bill: | gonys: | greytone: | |||
Pullus | 27-5-2023 | 5.625.251 | g-8|B | 70 | ||||||||
Pullus | 27-5-2023 | 5.625.252 | g-8|D | 120 | ||||||||
Pullus | 27-5-2023 | 5.625.253 | g-8|E | 136 | ||||||||
Pullus | 18-6-2023 | g-8|E | 773 | 206 | 105,9 | |||||||
Pullus | 18-6-2023 | g-8|B | 671 | 174 | 96,9 |
223-2023 (was yX540-2022) | |||
dam: | dam 2 central | ||
location: | 5 mtr N of nest 17, visible from N-side. Same as 2022, then X540. | ||
breeders: | cach x cach | ||
OBSERVATIONS: | |||
04-04-2023 | adult: | 2 cach present, but not y-X540. | |
09-04-2023 | nest: | empty, but nest is ready. | |
26-04-2023 | nest: | 2 eggs. Location is old red spot = 223/yX540. Eggs measured, no water test. | |
11-05-2023 | nest: | 3 eggs, C egg measured | |
18-05-2023 | nest: | 3 eggs | |
27-05-2023 | pulli: | 3x ringed. | |
18-06-2023 | pulli: | g-8|B & g-8|E trapped in water, with net. Measured. Not in fledged cohort, too young. | |
08-07-2023 | pulli: | g-8|B, g-8|D & g-8|E present: 3 chicks fledged. |