Danish WTE web camera 2015-2018

Haliaeetus albacilla nests in other countries

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Owlie
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Re: Danish WTE web camera 2015-2018

Post by Owlie »

albicilla wrote: May 20th, 2021, 12:33 am Saxfjed Nature Reserve with the WTEs nest and the windfarms Rødsand I and Rødsand II - 162 wind mills in total.

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Thank you albicilla!

Do you have data about eagle victims that have been lost in the rolling wind mill wings?
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Post by Owlie »

From this distance the eye looks all open now
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The cam position has been changed by a parent who took off from the cam stand earlier today.
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Post by Owlie »

What can we see ...? :puzzled:
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Post by Owlie »

The right eye
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A parent on the home perch was alarming for a while
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sova
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Post by sova »

Owlie wrote: May 20th, 2021, 5:00 pm What can see ...? :puzzled:
...
:hi: Owlie ...I ask myself the same thing.
1. Eye is closed, or (yellow)
2.Bump under the eye (pus?) (Red)
????

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Post by Owlie »

sova wrote: May 20th, 2021, 7:10 pm ...
1. Eye is closed, or (yellow)
2.Bump under the eye (pus?) (Red)
????...
The eaglet was sleeping, so the eye is closed, indeed. And I wonder, too, if the light stuff is discharge ...
I find it strange that the fault is only in one eye :puzzled: An infection would easily affect both eyes, wouldn't it?
I have tried to interpret how the eaglet uses its eyes and I don't see anything strange or abnormal in its way to look around.

In this perspective the eye looks just good
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I look forward that the cam crew finds an expert to give more information of the fault - and its prognose.

The appetite of the eaglet is just fine - supper this evening, an eel
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The night view
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albicilla
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Post by albicilla »

Thanks for pictures an comments.

I do not know much about the eye of a bird.
Just that they are big compared to the body size, and much more effective and better than ours.
And that birds have a third eyelid, which make it even more complicated.
Also as we look at the eye of the chick here. An eye with a problem, obviously.

Windmills and eagles:
We will never find out how many birds (and eagles) that are killed by windmills at sea.
They will fall down and disappear in the sea.
At the island Smøla outside the fjord of Trondheim with 50 breeding pairs of WTEs - the windfarm on land killed 60 WTEs from 2000 until 2010.

One of the eagles with GPS - not from this nest - was killed by a windmill on land north of Gedser 2 years ago. Viola it was called and reported dead on the 3/6-2019 at GPS orn_ https://www.dof.dk/naturbeskyttelse/arter/orne/gps-orn
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Post by Owlie »

albicilla wrote: May 20th, 2021, 11:42 pm ...
We will never find out how many birds (and eagles) that are killed by windmills at sea.
They will fall down and disappear in the sea.
...
That is what I have feared, too :cry:

But I am satisfied that DOF does its work studying the effects of the wind mill business :thumbs: :unsure:
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Post by Owlie »

21st May

A big eel waiting - no lack of food in this nest
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Post by Owlie »

May 22nd

:hi:

Information by Ole Friis Larsen [Google translation]:
Standing sleep and left eye
Written by Ole Friis Larsen on 22 May 2021 at 12.07

Birds have tendons in their legs and toes that 'lock' when the birds sink a little. Therefore, they do not fall off branches when sitting in the trees and sleeping.

However, birds also sleep differently from humans, who may be virtually unconscious during sleep. Birds usually do not fall into such deep sleep, but are ready to wake up immediately by a sound or movement close to them. Many birds can also sleep with one half of the brain at a time, while the other half is awake and ready to respond to danger.

In this way, for example, wall sailors can sleep while flying. This is probably also the case for other birds, which fly both day and night on the move.

As for the eagle cub's left eye, we are cautiously optimistic. It seemed that the inflammation (the white) in the eye was punctured the other day, and that the eye is turning black. It also seems to use the eye, which of course suggests that it can at least to some extent use the eye to see with. If the eye is healed and the kid comes to see, it is probably difficult to determine exactly whether it is abundant and healthy diet alone that does it. There is probably also a bit of coincidence in the game as well as an innately strong immune system.

And then just a little about 'Romme's journey. Previously, we readily assumed that young eagles in an area were offspring of local breeding pairs. With the GPS transmitters, we have learned that the opposite is true, and that young eagles in an area are often not the offspring of local breeding birds, because their young are out roaming far and wide. When we get to the end of September and the beginning of October, you can no longer count on young eagles in an area being the young of the year from local breeding pairs - even if you see them together with the local adult / adult eagles.
Wind shelter by Mum
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Post by albicilla »

MAY 23.

GPS transmitters on eagles and conclusions:
When human housewifes and others see a strange eagle on a camera at WTEs nest - young or old - it is often asked and discussed if it is offspring from the nest. But very, very rare it is so. GPSs tell the story. Here is what I have learned: When a young eagle leaves the nest(area) for good around september-november, usually - it makes longer and longer excursions away from the nest and area. And finds places away from the nest to survive the first winter. And flies up to 100-200 km away and around from its nest in the next years. They are passing their own nest or area once in a while. But are not focused on this area or place. Gunhild from 2017 told this story. It ended up 100 km north of its birth place and are now probably trying to breed there. It was then remowed from the Web site to avoid human presence at its new "home". Like many other birds, WTEs have a map in their brain and they know where they are and where to go. But why go "home"? It makes no sence, since the nest and area probably already is occupied by the parents or a new couple. Eagles see the big nests from above and are curious, maybe looking for food or for a breeding place and might have a look. They socialise with a few other WTEs og or go on their own. They are free. And that is it.
NB: These eagles are Danish eagles og or descendants - mainly moved in from Germany some 20 years ago. Eagles up far North are migrating birds.


Follow the eagles with transmitters her:
https://www.dof.dk/naturbeskyttelse/arter/orne/gps-orn


I am not sure that the left eye of the chick is ok, or on its way to be ok in the future.
When the female puts a piece of prey to the left side of the chicks beak, the chick does not react before the right eye ses it. I tried to catch a moment of what I mean:

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Post by Owlie »

:hi:

As addition to the knowledge how eaglets move from their birth territory I borrow a recent comment from the SWFL Eagle cam nest chat (not a scientific publication but a comment of a moderator):
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Post by Owlie »

:hi:

The situation with the eye(s) today. [Ungens aldre 40 dage = Eaglet's age 40 days]

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Some moment after these pictures it seemed to me that the eye was big and black for a while. :puzzled:
At least it looks like there would no more run any discharge, that is good!
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Post by Owlie »

Father eagle has brought big branches lately - is he aware of the eaglet's sight problem?
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Mother eagle has her point of view of the branches
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Post by Owlie »

It went a bit crazy. The poor eaglet didn't know what to do under the huge moving branch.
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At last mother moved the branch to the left rim.
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Post by albicilla »

MAY 24.

The chick is mowing away from the bowl now.
Also to get some warm from the parents, because it is cold and windy 11 Degrees Celcius also during daytime.
I think the male wants to set up a fence for the now mowing chick.
Greenery was brought by female to the early morning meeting.

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Later the chick wanted to see the rest of the world.
Standing there for almost 1 minute

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A quite normal doctor has a comment on the problem with the left eye of the chick:

GT:
Eye
Written by Claus Nielsen on 23 May 2021 at 18.42
I am probably only a “human doctor” but have tried using some screenshots of analyzing the eye problem.
About a third of the part of the eye closest to the beak is greyish and dull probably not transparent. The central part of the eye (cornea) seems to be undamaged and that part of the eye is responsible for the sharp eagle eye. I think it looks good.
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Post by Mamicja »

albicilla wrote: May 24th, 2021, 11:55 am MAY 24.

A quite normal doctor has a comment on the problem with the left eye of the chick:

GT:
Eye
Written by Claus Nielsen on 23 May 2021 at 18.42
I am probably only a “human doctor” but have tried using some screenshots of analyzing the eye problem.
About a third of the part of the eye closest to the beak is greyish and dull probably not transparent. The central part of the eye (cornea) seems to be undamaged and that part of the eye is responsible for the sharp eagle eye. I think it looks good.
:hi:
Maybe only the nicitating membrane is infected?
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Post by Owlie »

:hi:

Addition to "the human doctor's" comment [Google translation]
Eye
Written by Claus Nielsen on 24 May 2021 at 16.46
If the eagle is blind on the left eye, it would involuntarily try to compensate by tilting its head slightly (to the right) and at the same time turning its head slightly to the left. So far I have not been able to observe this. I therefore think it's OK.
This concludes the eye discussion
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Post by albicilla »

MAY 25.

The chick was alone all night, but raises and stands up and watches the surroundings.

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Female in with an Eel a little later.
The chick is standing now while eating.

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Post by albicilla »

May. 27.
Sitting, the kid tries to eat himself from an old wing.
The male comes in and lifts diligently into the nest straw.
May has been rainy, so straw is aerated at the slightest opportunity.
Cub looks with interest at the male activity.

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But then get started with wing training.

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