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Coordinators: Albert de Jong Leon Kelder Roland-Jan Buijs Thijs Horst Merijn Loeve Mars Muusse |
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location | Nest near tree April 24th, 2021. | April 9th, 2023: nest near rock (same as 2022). | April 26th, 2023: nest location. |
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eggs | Eggs April 24th, 2021: 3 eggs clutch. | Eggs April 26th, 2023: 3 eggs clutch. | . |
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partner 1 | June 2nd, 2020: hybrid-type. | June 2nd, 2020: hybrid-type. | June 2nd, 2020: hybrid-type. |
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partner 1 | April 24th, 2021: hybrid-type. | April 24th, 2021: partners. | June 17th, 2022: partners. |
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partner 1 | June 17th, 2022: female cachinnans. | June 17th, 2022: female cachinnans. | April 9th, 2023: female cachinnans. |
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partner 1 | April 9th, 2023: female cachinnans. | April 23 2024: female cachinnans. | April 30 2024: female cachinnans trapped:g-A|G. |
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partner 2 | May 21st, 2020: cachinnans. | April 24th, 2021: cachinnans. | May 13th, 2021: cachinnans. |
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partner 2 | June 17th, 2022: male cachinnans. | June 17th, 2022: male cachinnans. | April 9th, 2023: male cachinnans. |
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partner 2 | April 9th, 2023: male cachinnans. | April 23 2024: cachinnans, but broad medial band P10. | April 23 2024: male cachinnans. |
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pullus | May 21st, 2020: pullus b[F|G]. | May 21st, 2020: pullus b[F|H]. | May 15st, 2021: pullus hatched A-chick. |
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pullus | May 28th, 2021: b[F|J] and b[F|K]. | June 26th, 2021: b[F|K]. | May 22nd, 2022: pullus r-6.R. |
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pullus | May 22nd, 2022: pullus r-6.P. | 2023 fledged juvenile G-7|2. | 2023 fledged juvenile R-8.K. |
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pullus | June 18 2024: pullus g-B|N. | May 14 2024: pullus g-B|P. | June 18 2024: pullus g-B|R. |
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food | Food 2020: Round Goby. | May 14 2024: Perch and Roach-type. | May 14 2024: Chick threw up fish. |
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food | June 04 2024: fish = Roach. | . | . |
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Visits and data.
date: | |||||||
21-05-2020 | Two pulli found, ringed b[F|G] & b[F|H]. Food: Round Goby, wrap of pork sausage. Both adults overhead alarming. Both unringed. | ||||||
02-06-2020 | Adult with at least one ringed pullus at location. We didn't manage to read the code. | ||||||
16-04-2021 | Nest checked. No eggs. Adult present: female cachinnans-type same as last year. | ||||||
egg no: | width (mm): | length (mm): | volume (cm3): | water test on April 24th: | laying date: | ||
24-04-2021 | A | 51,9 | 74,0 | 100,36 | 40 - tip bottom | ||
24-04-2021 | B | 51,9 | 75,4 | 102,26 | 50 - tip bottom | ||
24-04-2021 | C | 51,1 | 71,8 | 94,40 | 30 - tip bottom | ||
sum nest: | 297,02 | ||||||
06-05-2021 | Female present. 3 eggs in tact. | ||||||
13-05-2021 | 2 partners present. Male is brutal cachinnans. | ||||||
15-05-2021 | 1 egg in tact. | ||||||
15-05-2021 | 1 egg hatching. | ||||||
15-05-2021 | 1 hatched chick. Mass = 75 gr. | ||||||
metal ring | darvic ring | mass | head + bill | ||||
28-05-2021 | pullus | .5559376 | b-F|J | 554 | 85,8 | Thrown up prey from chick: worms and fish. | |
28-05-2021 | pullus | .5559377 | b-F|K | 546 | 83 | ||
08-06-2021 | No visit. | ||||||
metal ring | darvic ring | mass | head + bill | wing | |||
26-06-2021 | pullus | .5559377 | b-F|K | 1174 | 125,5 | 363 | retrapped chick and controlled. |
In 2022, construction works (removal of trees and bushes) destroyed old location. In 2022, this nest is in LBBG section, east of T-split on dam 2. Nest with large boulders. Visits and data 38-2022: |
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metal | darvic | mass | wing | H+B | |||
22-05-2022 | pullus | .5625166 | r-6P | 303 | 58 | 73,2 | |
pullus | .5625167 | r-6R | 253 | 45 | 71,7 | ||
17-06-2022 | 2x pullus dead, both r-6P & r-6R. Bird flu? | ||||||
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 hybrid | 38-2023 | 69 | 50 | 86,85 | 68,6 | 52 | 93,40 | 67,8 | 51,9 | 91,95 | 272,20 | same as 2022 |
ring pulli: 14-mei | laying A egg: 11-apr | hatch A egg: 9-mei | ||||||||||
catch: | date: | metal: | darvic: | mass: | wing: | head+bill: | ||||||
Pullus | 11-5-2023 | NLA 5.556.468 | R-8.K | (on 18-5) 235 | (on 18-5) 67 | |||||||
Pullus | 18-5-2023 | NLA 5.556.421 | G-7|2 | 152 | 59,8 | |||||||
Pullus | 18-6-2023 | NLA 5.556.468 | R-8.K | 1077 | 328 | 122,4 | ||||||
Pullus | 18-6-2023 | NLA 5.556.421 | G-7|2 | 887 | 311 | 112,7 |
038-2023 | ||||||
dam: | dam 2 east of T-split | |||||
location: | 2 large boulders, west one is lookout post, 200 mtr E of T-split, on top of tarmac. Red flag at N-side between blocks. | |||||
breeders: | cach x river gull | |||||
OBSERVATIONS: | ||||||
09-4-2023 | 2 adults | cach type & river gull type on lookout. No eggs, but nest is ready. | ||||
26-4-2023 | eggs: | 3x egg, measured. Water test: | A: floating - halfway | |||
B: 80 - tip bottom | ||||||
C: floating - 1mm | ||||||
11-5-2023 | pulli: | 1 chick ringed, 1 egg hatching, 3rd egg still complete. | ||||
18-5-2023 | pulli: | 2 chicks present (R-8K and unringed one, which is now ringed g-7|2) 1 rotten egg. | ||||
18-6-2023 | pulli: | 2x fledged from nest (1x rotten egg). | ||||
25-6-2023 | pulli: | r-8K 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: | |
g-A|G (038) | cach | cach-type | 70,3 | 53,3 | 100,56 | 68,4 | 51 | 89,58 | 70,6 | 52,8 | 99,10 | 289,23 | |
2024 | # eggs | A-egg | hatch | # ringed chicks | # all chicks | # fledged chicks | comments | ||||||
3 | 11-4-2024 | 9-5-2024 | |||||||||||
dam: | dam 2 east of T-split | ||||||||||||
location: | Is 38-2023: 200 mtr E of T-split, on top of tarmac two large boulders, west one is lookout post. | ||||||||||||
parents? | same as 2022, 2023. In 2024 female trapped:g-A|G | ||||||||||||
ring pulli: | 14-May | ||||||||||||
date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale | 30-04-2024 | g-A|G | .5625296 | Dam 2 soos nest | PONT | F | >4CY | 424 | 1002 | 125,7 | 53,5 | 68,3 | 19 | 7 |
14-05-2024 | g-B|N | .5631167 | nest 38 | PONT | 1CY | 110 | |||||||
14-05-2024 | g-B|P | .5631168 | nest 38 | PONT | 1CY | 88 | |||||||
14-05-2024 | g-B|R | .5631169 | nest 38 | PONT | 1CY | 99 | |||||||
OBSERVATIONS: | |||||||||||||
12-04-2024 | eggs: | 1 egg, measured. | |||||||||||
21-04-2024 | eggs: | 3 eggs, measured. | |||||||||||
30-04-2024 | adults: | trapped female Caspian Gull, incubating 3 eggs. Now g-A|G. | |||||||||||
07-05-2024 | nest: | 3 eggs, cracks. | |||||||||||
14-05-2024 | chicks: | 3x ringed and measured. | |||||||||||
04-06-2024 | chicks: | 3x ringed chicks present. | |||||||||||
18-06-2024 | chicks: | 3x ringed chicks present. | |||||||||||
adult: | father guarding chicks. | ||||||||||||