Jan and Janika (Jõgeva County)

marika.solo
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Jan and Janika (Jõgeva County)

Post by marika.solo »

Jan and Janika (Jõgeva County)

Black stork nesting camera in Jõgeva County 2022
https://www.looduskalender.ee/n/node/6527 -
14.04.2022, Urmas Sellis, Triin Leetmaa

big thank to our Madli who is Estonian for translation :D

This year, the black stork's nests have two cameras in Estonia, one in Karula National Park and the other in Jõgeva County. We are watching the nest of Jõgeva County (“Black Stork2”) for the second year.

The breeding territory of black storks in Jõgeva County has been known since the early 1990s, when it was a successful breeding ground for several years. Among other things, the star of Estonia's first nesting camera, the black stork Tooni, also nested there. The camera was already in Tooni's new nest, not the nest currently visible in the camera. After Tooni left, this nest remained uninhabited for fifteen years (as far as we know). During the monitoring of the black stork in 2020, it became clear that the storks have re-used the old artificial nest and successfully nested on the half-decayed nest. Considering the very bad situation of the black stork in Estonia, the resettlement of the old place was a big surprise. In the early spring of 2021, instead of a decaying nest, we built a new nest base and installed a camera with an infrared sensor on it, which allowed us to monitor what was happening in the nest even at night.

The owner of the nest, named Jan, arrived at the nest for the first time in 2021 on the late evening of April 10. For a long time the male was alone, because the female Janika did not arrive until May 2. Due to the late arrival of the female bird, the onset of nesting was almost a month later than in black storks usual. Therefore, the three chicks fledged only until the end of August. Since the old birds were already migrating at that time, we took fish to the nestlings for extra food. Two of the three chicks died near the nest. The third, aptly named Julge (Brave), initially flew west toward Gotland. On the high seas, his forces subsided and he landed on a tanker headed for Primorsk, on which he sailed into the vicinity of Hiiumaa. From there, Julge headed south again. His satellite signal disappeared near Paris (read about Julge's adventures on a longer travel map). This year, the old birds arrived at the nest on April 8 and 11. They don't have rings. Whether these are the same birds that nested here last year still needs some research.

The future of Estonian black storks is dark. The population has been declining for a long time, and according to the latest estimates, only 50-70 pairs of black storks nest in Estonia. A large proportion of unpaired birds have been observed in the population for several years, and it is likely that there is a shortage of females. So far no clear reason is known why this is the case. The proportion of both sexes among nestlings is approximately equal. Thus, the daughters disappear before nesting or move elsewhere. In addition, high levels of mercury have been found in the blood of nesting birds, leading to changes in bird behavior, reduced fertility and a weakened immune system (see also here).

At the nest, we use an infrared camera, which allows the image to be transmitted even in the dark. With a black stork, you don't have to camouflage the camera much. So far, we haven't noticed that the camera is disturbing the nesting individuals much. Old birds rather sometimes wanted to lift the camera into the nest as a misplaced nest material. The camera is transmitted via the mobile Internet. The image then moves to the server of the Estonian Fund for Nature, where the video is being prepared and saved for YouTube streaming. Live stream is broadcasted for the viewers live through the Eagle Club YouTube channel. We recommend watching the Kotkaklubi channel in case the web address of the broadcast changes due to technical reasons. All other Estonian eagle and black stork nest cameras and a capercaellie lekking site camera can also be found on the Eagle Club channel. The use of the transfer from the nest for non-commercial purposes elsewhere is not prohibited, but please let us know if possible (send a message to urmas (at) kotkas.ee)

Sponsors are welcome at each camera, as some components need to be replaced each year. We do not have any project support for this. The Environmental Investment Center has supported the installation, dismantling and maintenance of cameras.

Black Stork Nest Camera Team and Supporters:
Eagle Club - related to the nest, camera installation and information sharing

Beta-Group - camera testing and setup, microphone construction, technical support

Looduskalender - Camera Forum on the Web

Estonian Fund for Nature - server room

Environmental Investment Center - financial support for deveryday activities and services

Several private donors - to cover unexpected and expected hardware costs

Thousands of observers - who are the most important, because otherwise the camera would not make much sense!
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Madli
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Re: Jan and Janika (Jõgeva County)

Post by Madli »

Intrusion of a foreign female into the Jõgevamaa black stork nest.
https://www.looduskalender.ee/n/node/6597
29.04.2022 Text: Looduskalender-R. Translation by Madli

There's no peace under the sky...

Why do such events happen during the breeding season?

There may be about half a hundred nesting pairs of black storks in Estonia (some are simply not found). The population is not strong and birds die during migration and also in nesting areas. Returning black storks can't find a partner, as we've seen on webcam.
Black storks with a hidden lifestyle do not tolerate disturbing during breeding time - whatever it is and sometimes the nest is abandoned. A few days ago, a lone black stork repeatedly tried to land in the Karula nest which is equipped with a webcam.
You can read and view an overview of the event in the LK forum: LINK

Let's keep an eye on what's going on because we don't know if there are any losses…

(Under photo)
The intruder has a brownish plumage which could imply, but not nescessarily, to a younger bird. There are lots of assumptions...
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Madli
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Re: Jan and Janika (Jõgeva County)

Post by Madli »

VIDEO: In the early morning, a foreign female was present again
https://www.looduskalender.ee/n/node/6602
30.04.22 (translation: Madli)

Early in the morning, the foreign female was in the nest again. It is believed that the bird spent the night nearby.
Crowding out of the nest was calmer than yesterday, it was suggested that the third is too much in the nest.

(Under photo)
Foreign female in the middle, her head feathers are browner.
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Madli
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Re: Jan and Janika (Jõgeva County)

Post by Madli »

VIDEO: Strange storks in both nests.
https://www.looduskalender.ee/n/index.php/node/6603
30.04.2022 (Translation: Madli)

We will see for how long the intruding female has the patience. The video is from the nest in Jõgeva county, but a strange black stork also comes to the Karula nest and this one should also be an un-ringed female. If anything more, we will try to let you know.

After noon, a fight took place in the Jõgeva nest, in which the male bird Jan also intervened, pushing the stranger out of the nest.

It is good that, judging by the eyes, the eggs have remained healthy so far.
marika.solo
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Re: Jan and Janika (Jõgeva County)

Post by marika.solo »

without corrections

Must-toonekurgede pesal on kaks nädalat mune haudutud - The eggs of the black storks have been hatched for two weeks
Postitas Looduskalender - K, 04.05.2022 - 12.12
https://www.looduskalender.ee/n/node/6616

(Under photo)
Pesamaterjali lisa toob isaslind Jan (The male bird Jan brings an addition to the nesting material)

Jõgevamaa pesal munes emaslind Janika esimese pesamuna 15. aprillil, teise 17. aprillil, kolmanda 19. aprillil, neljanda 21. aprillil, viienda 23. aprillil ja viimase kuuenda 25.aprillil.
Tavaliselt on must-toonekurgede pesas kolm kuni viis muna, aga Janika on selle numbri ületanud. Põhjuseks võib olla näiteks see, et esimene muna ei olnud viljastatud, aga vastuse võime saada alles pärast kurepoegade koorumist.
Haudeperiood võib kesta 30-st kuni 38 päevani ja millal must-toonekure paar haudumisega alustas ei ole samuti päris selge sest esimese ja kuuenda muna munemise vahe on kümme päeva.
Peamiselt haudub emalind, keda isaslind Jan vahepeal asendab.
Siiski peaksime arvestama, et emaslind Janika on haudunud umbes kaks nädalat ja kurepoegade koorumise ootusega saame alustada kolme nädala pärast ehk umbes 25. mai paiku.

without corrections
At the Jõgeva County nest, the female Janika laid its first nest egg on April 15, the second on April 17, the third on April 21, the fourth on April 23, and the last on April 25.
There are usually three to five eggs in a black stork's nest, but Janika has crossed that number. The reason may be, for example, that the first egg was not fertilized, but the answer can only be obtained after the young pups hatch.
The incubation period can last from 30 to 38 days, and when the black stork couple started hatching is also not very clear, because the difference between laying the first and sixth egg is ten days.
The mother bird mainly hatches, which is replaced by the male Jan in the meantime.
However, we should take into account that the female Janika has been hatching for about two weeks and we can start expecting the young to hatch in three weeks, around 25 May.
marika.solo
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Re: Jan and Janika (Jõgeva County)

Post by marika.solo »

without corrections

Jõgevamaa pesa on kolm nädalat mune haudutud - The eggs of Jõgeva County have been incubated for three weeks
Postitas Looduskalender - N, 12.05.2022 - 18.18
https://www.looduskalender.ee/n/node/6642

(Under photo)
Emaslind Janika saabus pesale (paremal) on tema haudejärjekord (The female Janika arrived at the nest (right) in her breeding queue)

Must-toonekurgede pesas on sagedamini kolm kuni viis muna, aga Janika on selle numbri ületanud. Põhjuseks võib olla emaslinnu tunne, et esimene muna ei olnud viljastatud. Vastuse võime saada alles pärast kurepoegade koorumist.
Haudeperiood võib kesta 30-st kuni 38 päevani ja millal must-toonekure paar haudumisega alustas ei ole samuti päris selge sest esimese ja kuuenda muna munemise vahe oli kümme päeva.
Peaksime arvestama, et emaslind Janika ja isaslind Karl on haudunud umbes kolm nädalat ning kurepoegade koorumise ootusega saame alustada paari nädala pärast ehk alates 25. maist.


There are more than three to five eggs in the nest of black storks, but Janika has exceeded that number. This may be due to the female feeling that the first egg was not fertilized. We can get an answer only after the hatchlings hatch.
The hatching period can last from 30 to 38 days, and when the black stork couple started hatching is not quite clear either, because the difference between laying the first and sixth eggs was ten days.
We should take into account that the female Janika and the male Karl (Marika: mistake - male Jan) have been hatching for about three weeks, and we can start expecting the young to hatch in a few weeks, ie from May 25th.
marika.solo
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Re: Jan and Janika (Jõgeva County)

Post by marika.solo »

without corrections

VIDEO: eilne vahejuhtum Jõgevamaa kurepesal - VIDEO: yesterday's incident at the stingray nest in Jõgeva County
Postitas Looduskalender - K, 18.05.2022 - 09.56
https://www.looduskalender.ee/n/node/6662

Emaslind Janika ja isaslind Jan pesale on üksikud liigikaaslased pesitsejatele ebamugavad. Alates aprillikuu lõpust esineb aeg ajalt võõraste poolseid rünnakuid pesaomanike vastu.
Eesti on must-toonekurgede pesitsuse põhjapoolseim ala. Osalt seetõttu märgatakse liikumas mittepesitsevaid isendeid, kes pole omale pesapaarilist leidnud.
Rõngastamata must-toonekurgede sugu on raske määrata, kuid arvatavalt on üksikuid linde rohkem isaslindude hulgas. Eilse sissetungi valguses ei saa olla päris kindel kumma sugupoolega võib tegemist olla. Sellised sündmused on pigem ohtlikud munadele ja pesitsusedukusele.


VIDEO
Kogu eilne vahejuhtum (The whole incident yesterday)

PHOTO https://www.looduskalender.ee/n/sites/d ... ungija.jpg
Sissetungija püüab hauduvat isaslind Jani pesast välja trügida (The intruder tries to push the hatching male out of Jan's nest)

The female Janika and the male Jan are uncomfortable with the nesters. Since the end of April, there have been occasional attacks on nest owners by strangers.
Estonia is the northernmost area of black stork breeding. Partly for this reason, non-nesting specimens that have not found a nesting pair are noticed.
The sex of non-ringed black storks is difficult to determine, but there are likely to be more single birds among males. In the light of yesterday's invasion, it is not possible to be sure which sex it may be. Such events are rather dangerous for eggs and breeding success.
marika.solo
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Re: Jan and Janika (Jõgeva County)

Post by marika.solo »

without corrections

VIDEO: tähtsundmused lähenevad must-toonekurgede pesas - VIDEO: Highlights approaching the nest of black storks
Postitas Looduskalender - K, 18.05.2022 - 10.32
https://www.looduskalender.ee/n/node/6663

(Under photo)
Varahommikune vaatepilt emaslind Janika ja isaslind Jani kaamerapesas Jõgevamaal (Early morning view of female Janika and male Jani in the camera nest in Jõgeva County)

Vaatame ajas tagasi, kuidas pesaelu alguse sai: esimese muna munes emaslind Janika 15. aprillil, teise 17.akp-l, kolmanda 19., neljanda 21., viienda 23. ja kuuenda 25. aprillil. Kuus muna must-toonekurgede pesas paistab haruldasena, aga selle üle saame arutleda pärast kõikide kurepoegade koorumist.
VIDEO
Näis, kas kuuleme täna kurepoja piiksumist
Suurtel lindudel võtab koorumine kuni paar päeva sest kooruv linnupoeg peab harjuma ju hapniku hingamisega. Me võime ainult oletada, et haudeaeg algas kurepesas 18. aprillil ja sel juhul on täna haudumise 30. päev. Haudeperiood sõltub osaliselt ka ilmastikust kestes 30-st kuni 38 päevani.
Huvitavad ajad igal juhul tulekul.
Vabandame veelkord, et eelmise nädala ülevaates oli eksitavat teavet.


Let's look back in time to how the nest life began: the first egg was laid by the female Janika on April 15, the second on April 17, the third on April 19, the fourth on April 21, the fifth on April 23 and the sixth on April 25. Six eggs in the nest of black storks seem rare, but we can discuss this after the hatchlings have hatched.
Video
Looked like we could hear the prankster beeping today
In large birds, hatching takes up to a few days, because the hatching bird has to get used to breathing oxygen. We can only assume that the incubation period began in the raven on April 18, and in this case today is the 30th day of incubation. The incubation period also depends in part on the weather from 30 to 38 days.
Interesting times are coming anyway.
We apologize again for the misleading information in last week's review.
marika.solo
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Re: Jan and Janika (Jõgeva County)

Post by marika.solo »

without corrections

Esimene kurepoeg koorunud - The first prickly (M: chick) hatched
Postitas Looduskalender - P, 22.05.2022 - 05.30
https://www.looduskalender.ee/n/node/6673

Must-toonekurgedel kestab haudeperiood 30-st kuni 38 päevani. Kui Jõgevamaa pesas kurepojad koorunud saame ülevaate koostada.

The incubation period for black storks lasts from 30 to 38 days. Once the pups in Jõgeva County have hatched, we can make an overview.

(Under photos)
Täna öösel koorus Janika all esimene kurepoeg ja munadest on piiksumist kosta (Tonight, Janika's first pup was hatched and there is a beep from the eggs
marika.solo
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Re: Jan and Janika (Jõgeva County)

Post by marika.solo »

without corrections

Kurepesas koorub neljas kurepoeg - The fourth cub hatches in the shoe nest
Postitas Looduskalender - P, 22.05.2022 - 22.40
https://www.looduskalender.ee/n/node/6677

(Under photo)
Kolm kurepoega ja esiplaanil kooruja (Three pups and a hatchery in the foreground)

Kolmas koorus veidi enne keskpäeva ja neljas kurepoeg on munast koorumas.
Vanalinnud on poegi toitnud, munakoored pesast eemaldanud – kena kui on hoolitsevad vanemad.


The third hatching is just before noon and the fourth pup is hatching from an egg.
The old birds have fed the pups, removed the eggshells from the nest - nice when the parents are caring.
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