Black Stork Nest In Karula 2023.

Cameras Watching over Black Storks nest
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Swenja
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Re: Black Stork Nest In Karula 2023.

Post by Swenja »

13:48 feeding
Karl II gathered forces to get the fish out. But finally he released the food.

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#1, #2 and #3
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#4
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Post by Swenja »

and again #4. Had 2 fish.

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The Throat Blocker

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Post by Swenja »

#1 and #2 don't want to get under Dad's blanket anymore. And neither does #3. :laugh:

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Post by Swenja »

15:15 feeding

#2 tries to swallow the big fish. The chick doesn't make it.
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#1 takes the fish.
All the chicks try to tear the fish to pieces.

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Post by Swenja »

15:22 and again feeding

Karl II gave the 2 fish again.

#2 grabbed the perch and wants to swallow it.

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The other chicks want to tear off pieces of the other fish.
# 2 also grabs this fish too.

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Karl II takes back all.

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# 2 is probably very hungry.
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Post by Swenja »

16:17 feeding
All 4 chicks are tugging at a fish.

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Karl II gives another fish. #2 eats it.

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Karl II takes back the other fish.

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Post by Swenja »

16:53 Kaia is here. Greeting and Karl II flies away.

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Post by Swenja »

16:55 feeding
Kaia brought tadpoles?, little fish, maybe frog?.

All chicks eat.

This is a whirlwind of food coming out of Kaia's beak.
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:puzzled:
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Maybe someone recognized some of the food?
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Post by Swenja »

after feeding

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Post by Swenja »

17:47 Kaia gives some food again.

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#1, #2 and #4 eat. #3 comes too late.

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But #3 is still more than full. :nod:

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Post by Anne7 »

Swenja wrote: June 10th, 2023, 4:56 pm ... Maybe someone recognized some of the food?
:hi:

I didn't really. But the chicks made me smile.

After this feeding, the youngest chick was used as a pillow by the other three. :D
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Kaia checked whether the little one was OK.
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:innocent:
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Edit:
Today, the chicks are 9 - 9 - 7 - 5 day old.

It seems to me that the size difference is increasing. (Especially #4 is still very small.)
Which was to be expected. :nod:
It will take a long time before the youngest chick(s) can catch up with the biggest.

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Post by Swenja »

Many thanks @Anne7 :hi:

19:10 Kaia gives the chicks a snack.

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#1, #2 and #4 eat.

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Post by Swenja »

20:23 Karl II comes home. They greet each other and Kaia flies away quickly.

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Post by Swenja »

20:26 feeding
He gives big fish for the chicks.
#1, #2 and #3 eat. #4 gets nothing.

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Karl II takes back one big fish.

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Post by Swenja »

#3 in food coma.

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Sweet #4 is still full. :nod:

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Post by asteria »

20.23 KarlII flew in, Kaia quickly flew away.
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Post by Swenja »

22:37 night vision

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Feedings:

05:42 Kaia porridge
06:19 Karl II #1, #2, #3, #4 and Kaia one fish.
07:30 Karl II #1, #2 and #3
08:15 Karl II
08:56 Karl II #3 and #4
09:15 Kaia feeding attempt
09:58 Kaia feeding attempt
10:12 Kaia feeding attempt
10:35 Kaia #1
12:12 Karl II #2 and #3
12:46 Karl II #3
13:23 Karl II feeding attempt
13:48 Karl II
15:15 Karl II
15:22 Karl II
16:17 Karl II
16:55 Kaia
17:47 Kaia #1, #2 and #4
19:29 Kaia #1, #2 and #4
20:26 Karl II #1, #2 and #4

Today there were some big fish from which the chicks could tear off pieces.
Therefore, there were feedings at short intervals.
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Post by tsang6482 »

Anne7 wrote: June 10th, 2023, 7:07 pm

It seems to me that the size difference is increasing. (Especially #4 is still very small.)
Which was to be expected.
It will take a long time before the youngest chick(s) can catch up with the biggest.
I'm wondering that size difference is partly due to its inconsistent food intake. The reason isn't because there's not enough food, but rather the food is unsuitable for #4 to eat. I don't think the food will get any smaller at this point.

Conversely, I rarely see #1 and 2 having an empty crop for the last 2 days. They still beg for food while there was food in their crops.
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Post by Anne7 »

tsang6482 wrote: June 10th, 2023, 10:56 pm I'm wondering that size difference is partly due to its inconsistent food intake. The reason isn't because there's not enough food, but rather the food is unsuitable for #4 to eat. I don't think the food will get any smaller at this point.

Conversely, I rarely see #1 and 2 having an empty crop for the last 2 days. They still beg for food while there was food in their crops.
:hi:
There are several reasons for this, tsang6482.

First, it is well known that starting from a 3rd, but certainly from a 4th egg, the mother's body provided fewer essential components to the egg, depending on the health and condition of the female. A mother bird's body is not an inexhaustible resource. So younger chicks have a physical disadvantage already from the start. *

Secondly, older chicks are anyway in a privileged situation during the feedings. They can reach things more easily, can swallow larger items of food and can also eat larger quantities during feedings... which - of course - makes them grow very fast. Faster than the younger ones.

The youngest chick in particular needs a lot of perseverance and intelligence to take on the preponderance of the older chicks.

Edit:
* I read that this is why the youngest chicks are given larger amounts of 'fighting' hormones than older chicks, as early as in the egg. To compensate. I don't remember exactly which hormone that is, maybe testosterone or some kind of adrenaline/corticosterone ? I'd have to look it up...

Edit 2:
Hatching strategies – when and why?
By Daryl Anne Goldman
... The female deposits differing amounts of hormones, immunoglobulins, and antioxidants in the yolk, albumen, and shells of the eggs she lays, which then affects the survival of each hatchling. For instance, in some species, yolk antioxidant and immunoglobulin concentrations may decrease across laying order, thus handicapping the immune system of the last-hatched chicks. However, in the same species, yolk testosterone concentrations may increase with laying order, which may compensate for poorer immune function by helping accelerate growth and food begging rates. ...
"... There is a higher rate of mortality with this hatching strategy [asynchronous hatching], and the last chick is usually not expected to survive and is more of an insurance policy against the loss of the first offspring. ... In some bird species, the firstborn, stronger chicks or even the parents may push the weaker, last-born chick(s) out of the nest."
https://goldengateaudubon.org/blog-post ... trategies/


Yolk is a source of maternal testosterone for developing birds
The testosterone content of canary eggs in a same clutch increased with the order of laying, regardless of the genetic sex of the offspring …
https://pubmed.ncbi.nlm.nih.gov/8265571/
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Post by Swenja »

June 11

Good morning!

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05:58 Kaia is at home! Short greeting and Karl II flies away.


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