DISCUSSION ESTLAT Osprey Nest 1 Madis & Piret ~ 2012

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maroni
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Re: ESTLAT Osprey Nest Webcam Discussion 2012

Post by maroni »

when they are quite alone? without parently control?
The parents fly away?
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Post by meierlein »

meierlein wrote::peek:

Feeding habits

As its Estonian name (literally “the fish eagle”) suggests, our smallest eagle feeds almost entirely on fish. It is probable that the sleeker body of this species has developed during evolution in order to improve its chances of catching fish and makes the osprey better suited for executing moves requiring dexterity. Its more dextrous and faster flight is the osprey’s advantage compared to its larger relatives. However, the osprey can never be sure that the fish it has caught will remain its prey, since in many good hunting grounds, white-tailed eagles have specialised on taking over the ospreys’ catch. Fish are caught from as deep as a meter below the surface, and sometimes, the entire osprey can disappear under water during this process. The osprey’s favoured prey is fish weighing 200-300 grams: it is difficult to fly far with a larger fish and catching smaller ones would be inefficient. The osprey can transport prey to its nest from a distance of over 25 km! Ospreys are everyday visitors at some fish farms and perform the necessary task of removing injured or diseased fish, although healthy fish also fall victim to their attacks. However, when the fish in the ponds grow too large for the birds (over 400 g), the ospreys relocate to other hunting grounds. One osprey needs about 300 g of food per day. If the ospreys reach the final destination of their migration before the ice has melted, or if their nesting period is dominated by especially bad weather, the birds have to either fast or feed on other prey—thus, osprey have also been seen hunting mice and frogs.

:thumbs:


URMAS should tell us too,
in what directions are the fishplaces, where MADIS catch their food

and how long it takes to fly back to the nest :book:

:bow:

:peek:

Dear URMAS

you have been talking about Avatars,
but didn`t tell us the important things we need to know,
before the chicks will leave the nest for learning to catch their fish

:bow:
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Post by gitana »

meierlein wrote:
:peek:

Dear URMAS

you have been talking about Avatars,
but didn`t tell us the important things we need to know,
before the chicks will leave the nest for learning to catch their fish

:bow:

Is there anybody local in this forum? I know Urmas is. Somebody else? Would be really nice to know what places are around the nest! Is it far the lake?
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Post by Cherie »

Good Morning dear Osprey Lovers :bounce:

Does anybody know how high the nest is from the ground?

We estimate about 25m but we are not sure. Perhaps anybody can give an information?

Greetz an ty alot :loveshower:
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Post by Starling »

gitana wrote: Is there anybody local in this forum? I know Urmas is. Somebody else? Would be really nice to know what places are around the nest! Is it far the lake?
:hi: This is from page 40 (25th May):
Urmas wrote: ...
Fish farm is not far, did not measure, but about two-three kilometers and the natural lake is even a bit closer...
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Post by maertha »

gitana wrote:Would be really nice to know what places are around the nest! Is it far the lake?
Hi gitana, Urmas wrote in May: “Fish farm is not far, did not measure, but about two-three kilometers and the natural lake is even a bit closer.”
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Post by Lunan »

Starling wrote: :hi: This is from page 40 (25th May):
I don't think they want to write to much about the location, because there is to many evil persons that might harm the birds if it was possible to figure out where they are.
If you would like to support the Eagle Club, the bank account details are:

KOTKAKLUBI (address if needed: Hauka kula, Valgjarve vald, 63406 Polvamaa)
IBAN: EE182200221040359778
BIC: HABAEE2X
Swedbank AS, 8 Liivalaia Street,15040 Tallinn, Estonia

If you like to donate some for specific action, please mention it when you make your donation.
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Post by maertha »

Urmas wrote:We with Latvian colleague Janis are going to look after the nest site and if we are lucky, one of parents could get transmitter - sorry for this additional disturbing (we really know that any additional device on bird makes not much happier it), but only so we could see where they travel and what places might be dangerous.
From other side we want to know about the transmitters impact, it is only possible if we look together and express the results. If something will be not well, we can improve our activity in the future. Hope you all understand! At the moment we do our best.
Thank you for informing us, Urmas. Good luck to you all!
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Post by maertha »

@Starling: Sorry, I just see you posted the information about the lake/fishfarm already earlier.
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Post by will(y) »

How will they manage to place the transmitter at the adult bird? Wouldn't he/she fly away if humans visit the nest?
Any ideas when it will happen (afternoon/evening)?

Will it look like this?
Image
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Post by meierlein »

will(y) wrote:How will they manage to place the transmitter at the adult bird? Wouldn't he/she fly away if humans visit the nest?
Any ideas when it will happen (afternoon/evening)?

:mrgreen:

UNO cannot be the one
he doesnt go flat anymore ^^

:wave:
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Post by meierlein »

will(y) wrote:How will they manage to place the transmitter at the adult bird? Wouldn't he/she fly away if humans visit the nest?
Any ideas when it will happen (afternoon/evening)?

Will it look like this?
...


no - it will look like this

http://www.kotkas.ee/images/97.jpg

:cry:
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Post by will(y) »

meierlein wrote: no - it will look like this
Image
ah, an remote-controlled osprey... :-|
Video of ringing an osprey chick and fitting the satellite transmitter:
http://www.youtube.com/watch?v=C6THdM7FsS4
Urmas wrote:[...]
We with Latvian colleague Janis are going to look after the nest site and if we are lucky, one of parents could get transmitter [...]
i can't imagine how this shall be done...
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Post by maertha »

alli wrote: I´m pretty new at this forum, but I´ve been following pretty closely the cam- I did not see Uno fly neither :unsure: So, you´re not the only one. Hopefully Martha will have some nice shots for us tomorrow/today :wave:

Good night everybody :loveshower:
Hi alli, I forgot to say hello to you yesterdy :blush:

I missed it yesterday, but this morning I had the opportunity to watch a similar scene - wing exercises (S8), then only two chicks in the nest. With the utmost probabilty this was no maiden flight, because every now and then a wing tip or tail tip was visible. I post some pictures and a video later. Maybe Macko has recorded the "big moment" yesterday?
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Post by juta »

Hello!
This time transmitter looks like this you can find on page here:

viewtopic.php?f=8&t=24&st=0&sk=t&sd=a&start=2160

They are going to give it to adult bird, not on the nest. There will be kind of trap on the ground where they are fishing, I think.
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Post by maroni »

Just for information.
We can learn about these birds.
http://born2bwild.nhm-wien.ac.at/BORN_w ... ssard.html
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Post by maertha »

Jasmijntje wrote:
I tend to think the same, but it´s hard to say when we can´t see it. When he/she was visible again, there was no noise - so probably you´re right and it was no landing. I really would like to be there now. It must be so interesting to see their first attempts to discover the world. :headroll:
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Post by Felis silvestris »

Thank you, Kukelke, for this really good post! In order to prepare the habitat the birds need, we have to know more about them and their life, how they migrate, when and where, what are the dangers (sadly enough human being is the greatest danger nowadays on their long migration). A transmitter is a good way to learn more about them, if they come back to the area where they are born etc. Ringing them is a small part as well.
I don't think that Urmas, who really loves "his eagles" would ever harm them! Juta already posted a link to the picture of the new smaller transmitters they are going to use, and I don't think they will be that disturbing! And - additionally - we will be able to follow such birds on the Migration Map in autumn.
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Post by Felis silvestris »

Birdie wrote: I have seen this transmitters for storks a few times and watch the routes they are flying each year. It is done from the most popular nature community here in Germany, called NABU.
They have done this with some kind of birds also, white tailed eagles, red kites and so on.
This is true, Birdie, and some of the most valuable information came from a White Stork called "Prinzesschen" (if I remember the name correctly) who flew with the transmitter for many years and when she finally died of old age and exhaustion in South Africa, the bird and transmitter were found and the people in Germany informed.
As far as I know, raptor specialist B.-U. Meyburg is at the moment busy putting transmitters on LSE in North Germany, and a lot of the facts we know about LSE come from "his" birds!
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Post by Birdie »

Felis silvestris wrote: This is true, Birdie, and some of the most valuable information came from a White Stork called "Prinzesschen" (if I remember the name correctly) who flew with the transmitter for many years and when she finally died of old age and exhaustion in South Africa, the bird and transmitter were found and the people in Germany informed.
As far as I know, raptor specialist B.-U. Meyburg is at the moment busy putting transmitters on LSE in North Germany, and a lot of the facts we know about LSE come from "his" birds!
Here is the NABU site in english, if somebody is interested :shake:

http://www.nabu.de/en/index.html
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