Estonian Osprey Nest (Ivo & Iiris) 2021

[Bea]

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Welcome everybody to the ninth season on this nest!

Camera link
https://www.youtube.com/watch?v=mOiXDIZU2kk

In case this camera link changed and doesn´t work, please visit the YouTube channel of Kotkaklubi to get the current link:

Kotkaklubi YouTube Channel
https://www.youtube.com/channel/UCCvBXT ... Saqd19N0Sg

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Ivo (ED) hatched and was ringed in 2013 by Joosep Tuvi, in a nest 50 km NNE in Jõgeva county

Iiris has no rings and so one can´t say something definite about her

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Nest is located in South Estonia, Tartumaa, not far from a fish farm. Natural river and ponds are in vicinity, too.

Ospreys (Pandion haliaetus) reach body heights of 50-66 cm, and wingspans of 1,27 - 1,74 m. Females are bigger than males.

- Winglength ♂ 448 bis 495 mm ♀ 470 bis 518 mm
- Weight ♂ 1,12 bis 1,74 kg ♀ 1,21 bis 2,05 kg

Usually two or three eggs are laid and incubated 36-41 days.
Young Ospreys fledge after 50-54 days.

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How to catch an adult osprey to ring it or equip it with a transmitter - documentation from Jürgen about an attempt in 2013:
https://www.looduskalender.ee/forum/vie ... 99#p260799

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Link to forum topic 2020: https://www.looduskalender.ee/forum/vie ... 42#p717242
Post wit seasonal summary 2020: https://www.looduskalender.ee/forum/vie ... 43#p717243

Link to forum topic 2019: https://www.looduskalender.ee/forum/vie ... f=56&t=958
Post with seasonal summary 2019: https://www.looduskalender.ee/forum/vie ... 59#p638859

Link to forum topic 2018: https://www.looduskalender.ee/forum/vie ... f=56&t=919
Post with seasonal summary 2018: https://www.looduskalender.ee/forum/vie ... 48#p570548

Link to forum topic 2017: http://www.looduskalender.ee/forum/view ... f=56&t=877
Post with seasonal summary 2017: http://www.looduskalender.ee/forum/view ... 23#p516223

Link to forum topic 2016: http://www.looduskalender.ee/forum/view ... 24#p452224
Post with seasonal summary 2016: http://www.looduskalender.ee/forum/view ... 25#p452225

Link to forum topic 2015: http://www.looduskalender.ee/forum/view ... f=56&t=764
Post with seasonal summary 2015: http://www.looduskalender.ee/forum/view ... 52#p365852

Link to forum topic 2014: http://www.looduskalender.ee/forum/view ... f=56&t=661
Post with seasonal summary 2014: http://www.looduskalender.ee/forum/view ... p=302925#p

Link to forum topic 2013: http://www.looduskalender.ee/forum/view ... f=56&t=550
Post with seasonal summary 2013: http://www.looduskalender.ee/forum/view ... 99#p217199

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We ask members to post no more than three pictures plus one video per posting


Too many or too big pictures/videos will be edited/deleted by admins/mods.

Please add camera time to your posts/pictures/observations! Thank you!

[Bea]

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Main events 2021

12. April --- Camera goes online https://www.looduskalender.ee/forum/vie ... 21#p789421

12. April --- Iiris and Ivo are already on the nest, we don´t know when they arrived, as cam started late this season https://www.looduskalender.ee/forum/vie ... 24#p789424


15. April --- Egg #1 is laid https://www.looduskalender.ee/forum/vie ... 39#p790539

18. April --- Egg #2 is laid https://www.looduskalender.ee/forum/vie ... 76#p791476

21. April --- Egg #3 is laid https://www.looduskalender.ee/forum/vie ... 82#p792382

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22. May --- Ospret #1 hatched https://www.looduskalender.ee/forum/vie ... 90#p802690

24. May --- Ospret #2 hatched https://www.looduskalender.ee/forum/vie ... 64#p802964

26. May --- Ospret #3 hatched https://www.looduskalender.ee/forum/vie ... 39#p803539

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3. June --- Juvenile Goshawk attacks Iiris https://www.looduskalender.ee/forum/vie ... 31#p805731


Osprets won´t get rings this season https://www.looduskalender.ee/forum/vie ... 40#p814540

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13. July --- First Ospret fledges https://www.looduskalender.ee/forum/vie ... 23#p815123

16. July --- Second Ospret fledges https://www.looduskalender.ee/forum/vie ... 68#p815968

17. July --- Third Ospret fledges https://www.looduskalender.ee/forum/vie ... 45#p816345

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[Bea]

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History of inhabitants

2013
Adults
Irma (U5) and Ilmar (AF) (former U6)
Osprets
Kaido (DJ), Kenno (DH) and Kaari (DK) died in August

2014
Adults
Irma (U5) and Ilmar (AF)
Osprets
Aino (AR) and Elar (DI)

2015
Adults
Irma (U5) and Joosep (J3)
Osprets
Niina (NN), Thor (NT) and Yolanda (NY)

2016
Adults
Irma (U5) and Ivo (ED)
Osprets
Ivar (RR) a second smaller ospret was blown off from the nest in storm

2017
Adults
Irma (U5) and Ivo (ED)
Osprets
Daisi (DX) and Daimar (DZ)

2018
Adults
Irma (U5) and Ivo (ED)
Osprets
Jaak (XJ), Heli (XH) and Kaja (XK)

2019
Adults
Iiris (no rings) and Ivo (ED)
Osprets
Mart (UM), Nele (UN) and Pilvi (UP)

2020
Adults
Iiris (no rings) and Ivo (ED)
Osprets
UW and UX (UX taken from the nest from a Goshawk)

[Bea]

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Forum members mail and Owlie made some statistics about the dates when Irma was first time seen back on the nest after her migration --- thank you!

....
In previous seasons Irma has first seen on the nest: 29.04.2013, 24.04.2014, 24.04.2015, 18.04.2016
....

http://www.looduskalender.ee/forum/view ... 23#p520623

IRMA's migration return dates:

2013: 29th April to Ilmar
2014: 24th April to Ilmar
2015: 24th April to meet with Joosep
2016: 18th April to meet with Ivo
2017: ... to Ivo?
....

http://www.looduskalender.ee/forum/view ... 90#p521290


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In 2017 Irma was seen back on the nest for the first time on 22. April
In 2018 Irma was seen back on the nest for the first time on 19. April
In 2019 Irma did not return to the nest. Breeding female was Iiris (possibly arrived at 13. April)
In 2020 Iiris was seen back on the nest for the first time on 7. April

[Bea]

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Forum member Sappheira made another interesting statistic --- thank you!

Period between arrival after migration and the first egg

2013
Irma and Ulmar; 10 days
April 29 - Irma (U5) arrived home in the afternoon. Ilmar delivered fish and they mated.
May 09 Egg #1 - (DJ, Kaido)

Oxana and Madis; 9 days
April 23 Piret left the nest. Madis mated several times a day with Oxana.
May 1 Oxana laid an egg.

2014
Irma and Ilmar; 9 days
April 17 - Ilmar arrives at the nest (first arrival 15:31)
April 24 - Irma arrives at the nest and starts attacking the "Dark Beauty" (18:44)
May 3 - Irma laid an egg.

2015
Irma and Joosep; 10 days
14. April - Osprey with ring J3 appears on the nest
24. April - Irma (U5) returns!
3. May - J3 is named Joosep
3. May Egg #1 is laid

Mai and Mikk; 9 days
23. April - Ringed Female Osprey on the nest, white numbers on black ring 29 left ankle.
1. May - Ospreys were named Mai (female) and Mikk (male)
1. May Egg #1 is laid

2016
Irma and Ivo, 13 days
18. April - Irma (U5) is back
19. April - Male Osprey with Estonian ring ED left – Ivo, probably first couple experience
1. May - Egg #1 is laid

Mai and Mati; 8 or 9 days?
16. April - Mai is back on the nest (ring 29)
20. April --- Unringed Osprey at (over the nest)
21. April - Unknown Osprey over the nest
28. April - new resident male Osprey is named Mati
28. April - Egg #1 is laid

2017
Ivo and 718
11. April - Ivo (ED) is back at the nest
12. April - Female Latvian Osprey (red ring with white numbers 718) arrives
Today is 9th day
Egg #1 is soon?

http://www.looduskalender.ee/forum/view ... 99#p522099


2017
There was no egg laid from Latvian female osprey 718
Irma arrived at 22. April and first egg was laid 2. May --- 10 days

2018
Irma arrived at 19. April and first egg was laid 29. April --- 10 days

2019
Irma did not return to the nest.
Iiris appeared on 13. or 19. April and first egg was laid on 26. April --- 13 or 7 days

2020
Iiris appeared on 7. April and first egg was laid on 22. April --- 15 days

2021
Iiris first seen on the nest on 12. April and first egg was laid on 15. April --- 3 days
This is not representative, as cam went online only on 12. April and we don´t know how long she was already on the nest

[Bea]

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Statistic from our forum member mogga --- thank you!

Bea, this are the dates when Irma was last seen before migration to Africa:

2013:
23. August

2014:
21. August
http://www.looduskalender.ee/forum/view ... 39#p341439 (Kisara)

2015:
19. August
http://www.looduskalender.ee/forum/view ... 64#p416864 (seira)

2016:
24. August
http://www.looduskalender.ee/forum/view ... 85#p495685 (Bea)

2017:
20. August
http://www.looduskalender.ee/forum/view ... 92#p548292 (Cessie)

http://www.looduskalender.ee/forum/view ... 39#p571039


2018:
26. August
https://www.looduskalender.ee/forum/vie ... 30#p613130 (Sunshine)

2019:
Iiris - 25. August
https://www.looduskalender.ee/forum/vie ... 60#p690560 (balistar)

2020:
Iiris - 12. August (?)
https://www.looduskalender.ee/forum/vie ... 69#p758369
There was a camera down time from 13. - 24. August

[Bea]

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Statistic from our forum member Sunshine - thank you!

Checked a statistics about when the ospreys were last seen on the nest. Hopefully this year's very warm summer will make them linger a bit more..

For Irma:
in 2013 - she was last sighted on 23 August
in 2014 - 21 August
in 2015 - 19 August
in 2016 - 24 August
in 2017 - 20 August
in 2018 - 26 August
in 2019 - (Iiris)

So Irma might presumably start the migration any time from 19 to 24 August. (2018)

Chicks:
in 2013 Kaido last seen on 8 September, Kenno 12 September
in 2014 Elar and Aino were last seen on 12 September
in 2015 Yolanda last seen on 5 September, Niina on 15 September, Thor on 19 September
in 2016 Ivar last sen on 4 September
in 2017 Daimar was last seen on the nest on 27 August and Daisi on 11 September
in 2018 Kaja was last seen on the nest on 3 September, Heli and Jaak on 6 September
in 2019

So the young osprets can presumably migrate any time from ~ 27 August to 19 September (2018)

The male:
in 2013 Ilmar was last seen on 12 September
in 2014 Ilmar was last seen on 12 September
in 2015 Joosep (J3) last seen on 18 September
in 2016 Ivo last seen on 4 September
in 2017 Ivo last seen on 11 September
in 2018 Ivo last seen on 6 September
in 2019

So Ivo might presumably start his migration journey any time from ~ 4 September to 18 September

(2018)

https://www.looduskalender.ee/forum/vie ... 63#p610263

I took the freedom to continue the datas in Sunshines quote, for better and ongoing overview / Bea

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Forum member mogga made a summary of the most common fish that is brought to the nest - thank you, mogga!

Once more the charts with the fishes Ivo typically delivers.
Now including the missing ones that Bea mentioned in addition.







All pictures taken from http://www.luontoportti.com
Except 'Common carp' and 'Mirror carp' taken from https://www.wikipedia.org/

https://www.looduskalender.ee/forum/vie ... 37#p596637

[Bea]

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Hello Osprey fans!

Camera opens late this season, but - WOW - there are already two ospreys around the nest and I think I just saw Ivo (ED) with a fish in his talons on the nest

Introduction will be filled later during the day, when I have more time.


Wish you all a good season with "our" ospreys and a happy ending, too

[Owlie]

Thank you Bea, the spring has come

Ivo in with his partial fish to Iiris, but Ivo took off with it

[Owlie]

Iiris


Iiris


Ivo again with the fish - and flew off with it, Iiris doesn't seem to be hungry

[Owlie]

Iiris settled down on the bowl and observed something in the skies

(Here her backhead marks)

12:13 Ivo was there alone again with his fish piece and took off.

[lispet]

Yes! Ivo, the super builder and super fisherman is here again! Lovely to see that they made it again to Estonia!

[Owlie]

12:36 a mating attempt

We know Ivo in this nest since 2016 and Iiris since 2019, they are strong migrators
Ivo hatched 2013 http://www.looduskalender.ee/forum/view ... 7f#p456925

14:23 another mating attempt

[Summi]

It's wonderful that both Ivo and Iiris are back.

[Owlie]

An attempt


Ivo flew off and returned - "Good views from here"


There was still a mating attempt some time after 15.00, I didn't record the minutes, it looked unsuccessful

[aquiline]

It is good to see Ivo and Iiris. One can never be sure that they will return. let's hope for a good season without any catastrophes.

Bea - Owlie - Summi - lispet

[Owlie]

all

Ivo has forgotten how to do it

[Owlie]

Is Iiris not ready yet - I haven't seen any successful mating by now in spite of many attempts...
Who knows, perhaps she just arrived today and is tired of the migration.

[seira]

16:00 Ivo and Iiris

16:01

[seira]

16:01 mating... attempt...

Iiris just moving with Ivo on her back