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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 location April 24th, 2021. | April 29th, 2022: nest (from north). | . |
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eggs | April 29th, 2022: full clutch, nest with 3 eggs. | April 9th, 2023: full clutch, nest with 3 eggs. | . |
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partner 1 | April 24th, 2021: cachinnans female. | April 19th, 2022: cachinnans female. | April 19th, 2022: cachinnans female. |
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May 13th, 2023: cachinnans female. | May 13th, 2023: cachinnans female. | . | |
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partner 2 | May 1st, 2022: cachinnans male. | April 19th, 2022: cachinnans male. | May 1st, 2022: cachinnans male. |
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May 13th, 2023: "dark eyed" cachinnans male. | May 13th, 2023: "dark eyed" cachinnans male. | . | |
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chicks | May 9th, 2022: pullus r[C.V]. | May 9th, 2022: pullus r[C.W]. | May 9th, 2022: pullus NLA 5.625.072. |
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May 11th, 2023: pullus r[8.G]. | May 27th, 2023: pullus r[8.G]. | June 18th, 2023: pullus r[8.R]. | |
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Visits and data:
date: | ||||||||
24-04-2021 | Patrolling adult and landing at location. We did not climb the dam to search. | |||||||
06-05-2021 | No bird present. | |||||||
15-05-2021 | No bird present. | |||||||
28-05-2021 | No visit. | |||||||
26-06-2021 | No visit. | |||||||
Visits and data 2022: Estimation egg laying: A-egg = April 08 2022. Estimating hatching = May 06 2022. |
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15-04-2022 | A egg | 68,1 | 50,4 | tip bottom - 40 | 2 blue eggs. | |||
B egg | 65,6 | 49,7 | tip bottom - 40 | |||||
C egg | 68,7 | 50,6 | tip bottom - 40 | |||||
19-04-2022 | 2 parents present at nest. | |||||||
29-04-2022 | A egg | float - 1 mm | ||||||
B egg | float - 1 mm | |||||||
C egg | float - 1 mm | |||||||
01-05-2022 | female is cachinnans. | |||||||
09-05-2022 | pullus | r-C.V | NLA 5625070 | |||||
pullus | r-C.W | NLA 5625071 | ||||||
pullus | -- | NLA 5625072 | pullus too small for plastic. | |||||
colour | metal | mass | wing | head + bill | bill | |||
17-05-2022 | pullus | r-C.V | NLA 5625070 | 257 | ||||
30-05-2022 | pullus | r-C.V | NLA 5625070 | 615 | 175 | 95,1 | 39,3 | |
food: fish is Roach | ||||||||
02-06-2022 | male alarming. | |||||||
17-06-2022 | No birds near nest, r-CW flying around at north side. | |||||||
21-06-2022 | No activities near nest, r-CV & r-CW & 3rd chick (only mmetal?) swimming at north side. If so, then 3x chicks fledged from this nest. | |||||||
12-07-2022 | R-CV & r-CW photographed. | |||||||
17-05-2022 | R-CW photographed. | |||||||
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 | 17B-2023 | 67,8 | 50,4 | 86,71 | 69,2 | 48,5 | 81,96 | 68 | 51,3 | 90,10 | 258,78 | same as 2022 |
ring pulli: 10-mei | laying A egg: 5-apr | hatch A egg: 3-mei | ||||||||||
catch: | date: | metal: | darvic: | mass: | wing: | head+bill: | ||||||
Pullus | 11-5-2023 | NLA 5556462 | r-8.G | -- | -- | -- | ||||||
Pullus | 11-5-2023 | NLA 5556463 | r-8.R | -- | -- | -- | ||||||
Pullus | 27-5-2023 | NLA 5556462 | r-8.G | dead >7 days ago | ||||||||
Pullus | 18-6-2023 | NLA 5556463 | r-8.R | 1133 | 356 | 131,9 |
17B-2023 | ||
dam: | dam 2 central | |
location: | on S-side "17B" coded on block, path to top of dam, in Blackberry complex. | |
breeders: | cach x cach | |
OBSERVATIONS: | ||
04-04-2023 | adult: | 2 cach present. |
09-04-2023 | adult: | 2 cach present. |
nest: | Nest with 3 eggs. No watertest, ring chicks in 1st session. | |
26-04-2023 | adult: | 1 cach present. |
nest: | 3 eggs. Not measured. | |
11-05-2023 | pulli: | 2 chicks ringed, is there a 3rd chick? |
13-05-2023 | adult: | pair present, same as 2022. Female spot on P10. Male dark eye. |
18-05-2023 | nest: | nest empty, no chicks found. |
27-05-2023 | pulli: | dead chick near nest: r-8G. |
18-06-2023 | nest: | no birds present. R-8R trapped in water with net & measured. Fledged: 1 chick. |
25-06-2023 | pulli: | r-8R present. |