Zivjērgļi Igaunijā (Irma un Ilmārs) 2014

[Sunshine]

19:48
Kāds prieks, kamera strādā un ligzdā kāds ir - Aino



Pēc mirkļa viņam pievienojas Elārs, uzreiz notupjoties savā tik jaukajā "bērna" pozā

[Sunshine]

19:57
Vakara miers nebija ilgs - pie apvāršņa parādījās Ilmārs ar zivi To saķēra abi, taču pēc zivs pastaipīšanas katram uz savu pusi šoreiz virsroku guva Aino

[Sunshine]

20:02
Elārs gaida savu kārtu

[Lianaliesma]

Interesanti... ka zivjērgļu ceļojuma uz savu ziemas mājvietu dienvidos maršruti gadu no gada atkārtojas un arī galamērķi sakrīt, vai ir tuvu...

No LK foruma:
Owlie
Re: Estonian Osprey Nests Ilmar & Irma ~ DISCUSSION~ 2014
September 5th, 2014, 8:12 pm

Does anyone (perhaps Kukelke?) have a link or information of transmitter birds' migration routes over several years? Do they return to the same winter resort every year and do they use the same route year after year?

What I already know is that they return in a fascinating way in the spring to the very same nest year after year after thousands of kilometres flights - I think it is such a miracle of the nature!

Kukelke
September 5th, 2014, 8:54 pm
On the interactive migration map you can search for the migration routes of past years: http://birdmap.5dvision.ee/index.php?lang=en
Here screenshots of the autumn routes of Estonian and Latvian ospreys: 2009 - 2012
No ospreys were tracked in 2013

As you can see, the individual osprey follows more or less the same route every year, although they can sometimes fly up to a two hundred km east or west from their previous migration route. I'm not sure why that is, perhaps something to do with wind conditions and visibility (they like tail winds and dislike rain, mist, low clouds, sandstorms and whatever else reduces visibility).

Their wintering grounds are always the same (just like their breeding grounds in summer), but sometimes they have to move a bit further when there's a drought or other conditions which make food scarce. You can see that with osprey Erika, who moved a bit further south in 2009 and 2011.

Also interesting is that osprey Erika in 2008, 2009 and 2011 at the start of her migration first went some 150 km to the northeast, into Russia, and then moved south again. Maybe she once discovered a good fishing spot there and used it to fill up her tanks with fuel before starting the real migration.

2006


2007


2008


2009


2010


2011


2012

[Vērotāja]

lianaliesma, kārtējo reizi paldies, ļoti interesants pētījums.
Citu putnu migrācijas ceļus protams no galvas neatceros, taču atmiņā palicis vidējais ērglis Toon, kurš no 2008.gada līdz šim pavasarim, kad izlādējās raidītājs, katru gadu veica vienu un to pašu ļoti īpatnējo migrācijas ceļu cauri Vācijai, Francijai uz ziemošanas vietām Spānijas dienvidos. Katru gadu vienādi.

[Lianaliesma]

Jā, ļoti interesanti, tas nozīmē, ka pirmo reizi lidojot uz dienvidiem, maršruts kaut kā tiek iezīmēts atmiņā un tad vienmēr atkārtojas ļoti tuvu. Un vēl jau ir jāpiemeklē labi vēju virzieni un laikapstākļi!

[Lianaliesma]

6.septembris
Labrīt

9.51 Ilmars ar brokastu zivi


9.51 Aino ar zivtiņu un Ilmārs laižas prom


9.52 Šis ir Aino atkal! Bez zivs! Kas noticis? Varbūt pazaudējis...

[Vērotāja]

Labrīt.

11.05 Iedrāzās Aino un aiz viņa Ilmārs ar zivi

[Lianaliesma]

11.05 Labais tētis Ilmārs

[Sunshine]

12:38
Nu taču netaisās nemaz prom uz Āfriku

[Lianaliesma]

13.40 Aino tika pie zivtiņas Abi ar tēti tūlīt pat aizlidoja katrs uz savu pusi.

[Sunshine]

17:47
Arī Elārs tepat vien vēl ap ligzdu grozās Ilmārs atnesa viņam zivtiņu un šoreiz Elārs ar visu zivi aizlidoja.

[Sunshine]

18:32
Abi mazie ielidoja ligzdā un Aino tika pie zivs

[Sunshine]

18:48
Šoreiz Elārs saņēma paprāvu zivi - šķiet, karpu

[Sunshine]

19:42
Aino izbauda rāmo novakaru

[Lianaliesma]

7.septembris

9.15 Elārs saņem brokastu zivtiņu

[Lianaliesma]

9.36 Zivtiņa priekš Aino

[Lianaliesma]

No LK foruma:

Urmas
Re: Estonian Osprey Nests Ilmar & Irma ~ DISCUSSION~ 2014
September 7th, 2014, 9:33 am

Discussion goes well, I see!
About the gender of chicks.
I was in nest too early for to say something about chicks sex, but Ülo went to ring later and he suggest that both chicks are males.
Actually we both did not take feathers for DNA (working in front of thousands of eyes is a bit different as usual), but according to my observation through cam, can support Ülos suggestion.

The data chart about chick development is possible to make also about our camera nests. If anybody wants to work with that, would be great as all data are public in that forum and also it is possible to download the saved streams.

Think, the fledging and departure age depend on food richness brought to chicks. Our camera nests are quite close to fish farms, so there is enough food, but in some other place these results could differ. Such differences we have seen in Black Stork nests.

There was question about Erika and Piret relations - think there is no relations, though we can't confirm that, as no data available.

[Vērotāja]

12.40 Ilmārs atnesa zivi Elaram. Nodošanas ceremonija bija ilga, liekas, ka mazais sācis mazliet baidīties no tēva, neskrēja un nerāva to zivi kā kad bija mazs. Tagad viņš pazemīgi čiepst blakus Ilmāram līdz tas atļauj zivi paņemt.
Izskatās, ka attiecības no tēvs-bērns palēnām sāk transformēties divu pieaugušu putnu attiecībās.

[Vērotāja]

lianaliesma, liels paldies, ka iekopēji Urmasa viedokli, Lk ieskatos ļoti reti.
Par Aino dzimumu jau sen likās, ka puika, bet redz Elars arī. Laikam sagadīšanās, bet par to, ka Elars puika, iedomājos pirms 10 minūtēm skatoties kā Elars ņēma no Ilmāra zivi. Liekas, ka mātīte ņemtu zivi no tēviņa (un tēva) bez problēmām jebkurā vecumā, bet Elarā šodien pirmo reizi pamanīju bailes no tēva.

lianaliesma, par kādu tabulu Urmass runā? Vai LK biedri grib salīdzināt izlidošanas datus?