continuation - experts opinion
1/ Māris Strazds, Latvia (May 12)
... I cannot comment. „Females sit on males” is a form of reversed mating. I don’t think this is it. I would say some next days might show if my thoughts might be in right direction – I have a few cases with trail-camera images when we can see result, however there is no detailed information in those cases how this start. I mean cases when there is a shortage of food and adult kills juvenile at some point. Could this be the case? ...
2/ Darius Anderwald, Poland (May 14)
... hmm, it's hard to say. They're just animals. I wouldn't look for anything more than some kind of tension relief. ...
3/ Luis Santiago Cano Alonso, Spain (May 14)
... From my point of view, this is simply a weird behaviour of a specimen, as there are many others. ...
Discussion to nesting
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marika.solo
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Re: Discussion to nesting
POLAND
Congratulation to Mr. Darius Anderwald and the whole team!
Best practices for the conservation and management of the black stork in Poland – 2024 winner!
english: https://environment.ec.europa.eu/news/b ... refLang=pl
About the winner
Overview
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Najlepsze praktyki w zakresie ochrony bociana czarnego i zarządzania nim w Polsce – zwycięzca w 2024 r.
Strona została przetłumaczona maszynowo.: https://environment.ec.europa.eu/news/b ... &etrans=pl
O zwycięzcy
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Zdjęcia od zwycięzcy
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Congratulation to Mr. Darius Anderwald and the whole team!
Best practices for the conservation and management of the black stork in Poland – 2024 winner!
english: https://environment.ec.europa.eu/news/b ... refLang=pl
About the winner
Overview
Pictures from the winner
Videos from the winner:
Najlepsze praktyki w zakresie ochrony bociana czarnego i zarządzania nim w Polsce – zwycięzca w 2024 r.
Strona została przetłumaczona maszynowo.: https://environment.ec.europa.eu/news/b ... &etrans=pl
O zwycięzcy
Przegląd
Zdjęcia od zwycięzcy
Filmy zwycięzcy:
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marika.solo
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Re: Discussion to nesting
https://dabasdati.lv/lv/article/par-mel ... es-ligzda/
Māris Strazds 2024-06-20
On ringing black storks in an online nest
I asked for permission to publish the translation of the article here. It contains important information especially for newcomers.
Māris Strazds 2024-06-20
On ringing black storks in an online nest
I asked for permission to publish the translation of the article here. It contains important information especially for newcomers.
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marika.solo
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- Posts: 14363
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Re: Discussion to nesting
Anderwald D, Sławski M, Zadworny T, Zawadzki G. Are Current Protection Methods Ensuring the Safe Emancipation of Young Black Storks? Telemetry Study of Space Use by Black Storks (Ciconia nigra) in the Early Post-Breeding Period. Animals. 2024; 14(11):1558. https://doi.org/10.3390/ani14111558
- thirty-four transmitters were placed on birds from 18 nests (the size of the analysed broods ranged from two to four young)
some findings:
- the age of making the first flight attempts at an average of 65 days and the final departure from the nest at an average of 87 days
- the duration of flight in the immediate vicinity of the nest ranged from 10 to 42 days for individuals, with an average of 21 days
- until the nest was completely abandoned, the zone within 200 m of the nest was the most heavily used (birds spent more than 80% of their time in this area)
- after the 70th day of life, young storks usually spent the night outside the nest in the stand at a distance of 200–250 m from the nest
- the average time between the first flight from the nest and the start of migration was 21 days
- the average date of departure of a young BS in Poland was 10 August; nests located further south were left earlier by young birds; nests located further west were left later
For long-distance migrants, such as BSs, the period before the start of migration has a crucial influence on the condition of the bird and may affect the survival rate of migrating birds.
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STORKLETS in the Bolewicze nest (SKierka + Królewicz) this season/2024:
- first flight attempts: 08.07 and next days - 64 days old
- final departure: 25.07 (4 of them) - 81 days old
- time between the first flight from the nest and the start of migration: 17 days (approx.)
- thirty-four transmitters were placed on birds from 18 nests (the size of the analysed broods ranged from two to four young)
some findings:
- the age of making the first flight attempts at an average of 65 days and the final departure from the nest at an average of 87 days
- the duration of flight in the immediate vicinity of the nest ranged from 10 to 42 days for individuals, with an average of 21 days
- until the nest was completely abandoned, the zone within 200 m of the nest was the most heavily used (birds spent more than 80% of their time in this area)
- after the 70th day of life, young storks usually spent the night outside the nest in the stand at a distance of 200–250 m from the nest
- the average time between the first flight from the nest and the start of migration was 21 days
- the average date of departure of a young BS in Poland was 10 August; nests located further south were left earlier by young birds; nests located further west were left later
For long-distance migrants, such as BSs, the period before the start of migration has a crucial influence on the condition of the bird and may affect the survival rate of migrating birds.
------
STORKLETS in the Bolewicze nest (SKierka + Królewicz) this season/2024:
- first flight attempts: 08.07 and next days - 64 days old
- final departure: 25.07 (4 of them) - 81 days old
- time between the first flight from the nest and the start of migration: 17 days (approx.)
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marika.solo
- Site Admin
- Posts: 14363
- Joined: 29 Sep 2021, 09:38
Re: Discussion to nesting
LATVIA - nest in Ogres County (Vidzeme)
Ogris and Urga, 4 storklets - 74/74/73/72 days old
regarding to the screaming humans
1/ It is true that this nest site has a protection zone, so called mircoreserve, however, that does not restrict anybody from entering that forest (any time of year). No formal rules are broken here.
5) This nest is quite close to a driveable forest road where it is convenient to park a car, so at some extent it is a surprise that there are so few visits (near bye) so far
7) Adults do not care humans next to nest tree or near bye while approaching nest with (large) juveniles – most of them seem to approach nest „on autopilot” mode. About once in 10 cases during ringing adults approach nest and feed youngs while we are under nest or even on the tree straight under the nest. A few times adult bird has almost landed on back of my college who is IN the nest.
All that said, it is not „innocent” if people frighten birds to the point when they all leave the nest and never return – see my previous email about departure ages. Mean age of birds that leave the nest because of (human; precise cause not known in most cases) disturbance is 76,8 days (67.4-82,6, n=25). Age of this company at the time of my writing is 73,6 (F3), 73,8 (F4), 73,0 (F5) 71,7 (F6). Two of those frightened 25 are younger than the youngest of these four. An important addition to that is – none of those 25 have appeared anywhere afterwards. Some still might (we do have the 1st records of some ringed birds be registered just 10 years after their ringing) but for now they are likely among those that have failed. So I consider significant disturbance this time of year be worse than any other time of breeding season. (Disturbance in early spring may mean there might be no breeding at all, however adults in that case are free and can „enjoy summer” on their own, if it happens now it may mean waste of season, no success plus both adults are exhausted and may have reduced capacity to make it to the next year).
Ogris and Urga, 4 storklets - 74/74/73/72 days old
- I have received by email the information provided by Dr. M.Strazds on this situation (to possibly publish it here - consent of the addressee)
regarding to the screaming humans
1/ It is true that this nest site has a protection zone, so called mircoreserve, however, that does not restrict anybody from entering that forest (any time of year). No formal rules are broken here.
5) This nest is quite close to a driveable forest road where it is convenient to park a car, so at some extent it is a surprise that there are so few visits (near bye) so far
7) Adults do not care humans next to nest tree or near bye while approaching nest with (large) juveniles – most of them seem to approach nest „on autopilot” mode. About once in 10 cases during ringing adults approach nest and feed youngs while we are under nest or even on the tree straight under the nest. A few times adult bird has almost landed on back of my college who is IN the nest.
All that said, it is not „innocent” if people frighten birds to the point when they all leave the nest and never return – see my previous email about departure ages. Mean age of birds that leave the nest because of (human; precise cause not known in most cases) disturbance is 76,8 days (67.4-82,6, n=25). Age of this company at the time of my writing is 73,6 (F3), 73,8 (F4), 73,0 (F5) 71,7 (F6). Two of those frightened 25 are younger than the youngest of these four. An important addition to that is – none of those 25 have appeared anywhere afterwards. Some still might (we do have the 1st records of some ringed birds be registered just 10 years after their ringing) but for now they are likely among those that have failed. So I consider significant disturbance this time of year be worse than any other time of breeding season. (Disturbance in early spring may mean there might be no breeding at all, however adults in that case are free and can „enjoy summer” on their own, if it happens now it may mean waste of season, no success plus both adults are exhausted and may have reduced capacity to make it to the next year).