Black Stork Nest in Karula 2022

Cameras Watching over Black Storks nest
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Anne7
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Re: Black Stork Nest in Karula 2022

Post by Anne7 »

I hope the same, Swenja.
Constant rain wouldn't be good. Not for fishing and not for flying either.
Moreover, the little chicks shouldn't get wet.

At 17:57 Karl II is up again. Some nest care, a PS, and back on the eggs.

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The eggs are currently hardly visible. They lie deep in the nest bowl.
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Anne7
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Post by Anne7 »

18:20 Karl II is up again.

He pokes extensively in the nest floor. He shakes his feathers, continues with the nest work, turns the eggs and covers them.

:mrgreen:
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I have to go now. :wave:
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Swenja
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Post by Swenja »

Thanks for the information from Urmas @Jo UK.
To increase the volume for the camera transmission in youtube, there is also an add-on for Firefox, for example.
Surely it is also possible to find something suitable with other browsers.

Many thanks for the beautiful pictures @Anne7

Karl II is too warm.

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Swenja
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Post by Swenja »

22:17 night vision turns on

Karl II loosens the nest floor, PS and covers the eggs again.

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PS again with dark pieces.

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Swenja
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Post by Swenja »

23:34 Karl II hisses. Owl? hearing noises

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Post by balistar »

Yes, Swenja :hi: , it was again the ural owl, the calls seemed to come from the same direction as last time, maybe a little bit farer away. Close enough for Karl II who raised his neck and back feathers, it started already at 22.32.
The hissing was 22.34 (as your picture shows).
Afterwards one more call, then was quiet.
Karl II was up in regularly intervalls for taking care of nest bowl and eggs, 22.57, 23.23, 23.50, 00.32, 01.07.

Good night :wave:
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Post by Urmas »

There are heavy machines to be heard since 6:03. Not known, in what distance to nest they are, but military exercises are ongoing in southern Estonia. Those heavy engines can be heard form quite far. Local ranger will check the path following to the nest area.
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Post by Swenja »

May 24

Good morning!

Many thank @balistar :hi:
Thank you @Urmas for the information. The military is always loud, but I hope they don't practice in the conservation areas. :rant:

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Karl II loosens the nest floor and rolls the eggs. He covers the eggs again.

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Karl II continues to work on the nest hollow.

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Post by Swenja »

Kaia comes to the nest. Nice greeting.

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Karl II fetches nesting material.

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Post by Swenja »

09:33 He brings grass with roots.

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09:35 grass with roots and a twig.

09:42 Karl II brings grass again.

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Post by Swenja »

09:49 Karl II brings moss and grass.

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He's trying to fix the nest edge.

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09:50 He flies away and flies around in the forest, then he comes back to the nest.

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09:51 He flies away again.
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Post by Swenja »

Kaia covers the eggs. She sits in the sun and her is warm.

She has to yawn.

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A buzzard can be heard.

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Post by Swenja »

Kaia observes something.

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Post by Swenja »

Kaia touches the eggs.

touch with left

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touch with right

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Anne7
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Post by Anne7 »

Hello :hi:

Thanks for the information, Urmas.
I hope the military exercises will not disrupt nest life (too much).

Swenja, wonderful documentation! Thank you. :2thumbsup:
Swenja wrote: May 24th, 2022, 10:49 am Kaia touches the eggs.
touch with left
touch with right
...
Yes, Kaia clearly has sensed her eggs. :nod:

I think it is important for us to realise that what she feels (through the Herbst corpuscles, or also called ‘Herbot’s corpuscles’) is something quite different from what we might perceive with our sense of touch.
In us humans, touch sensations (pain, heat, itching, etc.) begin as signals generated by touch receptors in our skin. These signals travel along sensory nerves made up of bundled fibres that connect to neurons in the spinal cord. Then the signals travel to the thalamus, which relays the information to the rest of the brain. The next stop is the somatosensory cortex, where the signals are converted into a sense of touch.

Birds have very few of these touch receptors and nerves in their legs. It is mainly bone and tough, scaly skin. Therefore, they tolerate cold and walking on uneven surfaces, such as gravel, well.

There are two main reasons that birds aren't affected by cold feet:
1. Blood circulates through the legs and feet of birds very quickly, and blood vessels in this part of the body are positioned closely together. Because of this, blood doesn't have a chance to cool enough in their legs to cause discomfort or distress. Due to this quick circulation, their blood is quickly warmed in their core before being sent back to the feet.
2. Bird legs and feet have very few pain receptors and little fluid. The surface is dry and scaly, with no moisture, which means they don’t have to worry about their feet freezing and getting stuck to metal perches, even on a cold and snowy day.
https://www.lyricbirdfood.com/birding-h ... he-winter/



However, some birds, especially wading birds, have something special, something extra. They have, so to speak, a 6th sense.
The Herbst corpuscles in the tip of their beak and in their feet register vibration/movement.

Bird beak extra sense evolved more than 70 million years ago
An organ that allows some birds to detect the movement of hidden prey by plunging their beaks into the ground seems to have been present in early birds 70 million years ago, and probably first appeared in their dinosaur ancestors.
Special “remote touch” sensory receptors known as Herbst corpuscles, which are found within densely packed pits in the beak’s tip, help birds detect the movement of worms in soil or small fish in water – even several centimetres away from the beak. This effectively gives birds a “sixth sense”, according to Carla du Toit at the University of Cape Town in South Africa and her colleagues. ...

Read more: https://www.newscientist.com/article/22 ... z7UCBh2ZZl
“Clearly, animals know more than we think, and think a great deal more than we know.”
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Anne7
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Post by Anne7 »

Today, the first laid egg is 30 days old

It is still hot on the nest. Kaia is panting.
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12:44 Kaia gets up, shakes her feathers, scratches her head, aerates the nest bowl, turns the eggs, rearranges the moss, preens, touches an egg with her toes, and covers her eggs again.

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Carefully touching an egg while rearranging the moss
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“Clearly, animals know more than we think, and think a great deal more than we know.”
— Irene Pepperberg
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Anne7
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Post by Anne7 »

13:11 Kaia gets up. She preens, does some nest work, preens more, scratches her head, turns the eggs and covers them

A highly flexible neck. :D
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13:32 There is more shade on the nest now.
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I will be away for several hours. :wave:
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Swenja
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Post by Swenja »

Thank you @Anne7 :hi:

Herbst corpuscles is an ingenious thing of evolution. I think that's why birds have a very much faster reaction and coordination than humans.
Just when I think of the notorious human "shock seconds" or that "something bit me", even though the mosquito has long since flown
away satisfied. :rolleyes:
Very interesting this complex of Herbst corpuscles.

Meanwhile shadow is in the nest. Kaia can acclimate.

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Kaia got up, preenes herself and wanted to scratch her head. Then she got into a tumble.

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Post by Swenja »

16:48 Karl II comes to the nest. Short greeting.

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Kaia flies away quickly.

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Karl II's shift begins. 8-)

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Post by Swenja »

Karl II you look very tired.
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He rolls the eggs and PS. PS looks white again.

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Karl II works continuously on the nest trough. Because of this and the added nesting material, the eggs are now deeper.

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