Re: Discussion about migration

marika.solo
Site Admin
Posts: 10235
Joined: 29 Sep 2021, 09:38

Re: Discussion about migration

Post by marika.solo »

KATRIN
Madli wrote: 10 Dec 2021, 10:46 It seems to me, that KATRIN feels quite "at home" in this area. I'm already thinking that she will overwinter there too...I looked up about the climate in the Bergama (Aegean) region.

Along the west coast of Turkey, overlooking the Aegean Sea, where the remains of ancient Greek cities like Pergamum and Ephesus are found, the climate is Mediterranean, with mild, relatively rainy winters and hot and sunny summers.
https://www.climatestotravel.com/climat ... west_coast

Here are some average weather facts about Bergama:

https://weather-and-climate.com/average ... -tr,Turkey
  • During the month of April, May and October you are most likely to experience good weather with pleasant average temperatures that fall between 20 degrees Celsius and 25 degrees Celsius.
  • The hottest season / summer is in June, July, August and September.
  • The months of January, February, November and December have a high chance of precipitation.
  • Bergama has dry periods in June, July, August and September.
  • The warmest month is August with an average maximum temperature of 32°C.
  • The coldest month is January with an average maximum temperature of 12°C
  • December is the most wet month. This month should be avoided if you are not a big fan of rain.
  • August is the driest month.
  • July is the most sunny month.
click for bigger pic
Image
https://www.besttimetovisit.co.in/turke ... a-3753771/

So maybe someone has a comment about if this is a normal habitat for a stork to stay over winter? The temperatures are fine, but it is very wet and rainy.. :?:
marika.solo
Site Admin
Posts: 10235
Joined: 29 Sep 2021, 09:38

Re: Discussion about migration

Post by marika.solo »

KATRIN
marika.solo wrote: 11 Dec 2021, 08:37 Hi Madli,

only a few black storks are monitored by transmitters in comparing e.g. with white storks. Therefore, the published data for black storks are scarce.

There are known cases of wintering black storks in the south of Europe (Spain, France, Greece, but also Bulgaria). And you found information about the wintering of one juvenile black stork in Albania.

I am not familiar with the case of black stork wintering in Turkey. I have only seen photos of white storks, solitary individuals (probably with some handicap, for example one stork flew only low and for a short distance).

I believe that as food resources dwindle, a healthy individual will move to a more appropriate area. I hope Katrin is healthy and will fly out of the area if necessary. Finger crossed very, very much!
marika.solo
Site Admin
Posts: 10235
Joined: 29 Sep 2021, 09:38

Re: Discussion about migration

Post by marika.solo »

KATRIN
Madli wrote: 11 Dec 2021, 09:48 And talking about KATRIN's feeding...

She mainly uses man-made straight drainage channels or ditches for feeding. There is only one natural water flow she visits (in Yayakent). So that makes me question about the availability of different food types.

Drainage channels (dykes, drains, ditches, lanes, rheens, rhines or rhynes) come in a variety of types and are common features on farmland. Water is a huge attraction to wildlife and drainage channels benefit different species depending on their type. Clean water provides habitat for numerous aquatic plants, invertebrates such as dragonflies, water beetles and snails, and vertebrates such as otters, water voles, fish and amphibians.
(https://www.rspb.org.uk/our-work/conser ... -channels/)

I hope that this list of aquatic life exists also in the Turkish ditches :)
Because it is very wet right now in Katrin's area - frequent rains, then hopefully the ditches are filled with life too! The temperatures are also relatively warm ...
marika.solo
Site Admin
Posts: 10235
Joined: 29 Sep 2021, 09:38

Re: Discussion about migration

Post by marika.solo »

Madli, please write here your post, which I "lost" when I moved it to this new thread. Sorry.
User avatar
Madli
Posts: 3799
Joined: 29 Sep 2021, 18:41

Re: Discussion about migration

Post by Madli »

KATRIN
  • It is true- there is clearly not enough observations and studies about the black stork. There is plenty of information available about the white stork though. Although they are different-in some cases, in my opinion, they are similar enough.
  • There are storks wintering in Europe and they surely discover new places that are suitable for them. As the climate changes, the weather conditions in the higher altitudes also become more suitable for a bird to survive the winter. That could be the case in Turkey. Besides, a juvenile bird lives just one day at a time. Katrin doesn't know what tomorrow brings. At the moment she seems to be satisfied with the current situation.
  • As we discussed with you yesterday, Katrin may be at her (first) wintering area. I askd Urmas about Katrin's situation. His Turkish colleagues also couldn't give a straight answer if a black stork has ever wintered in that area( the Bakırçay Delta wetlands). Although they were able to photograph a solitude adult black stork in this area at the exact time as Katrin was visiting there too. Unfortunately, Katrin herself was not visible at that time. So we could guess that these two storks met at some point, but we can't be sure. All we know now is that Katrin left the wetlands and is now in a different area(probably alone).
To be continued
User avatar
Madli
Posts: 3799
Joined: 29 Sep 2021, 18:41

Re: Discussion about migration

Post by Madli »

KATRIN - continuation

I did some research and came across this study Wintering in Europe instead of Africa enhances juvenile survival in a long-distance migrant, (2017) It is based on an example of the white storks, but I think that this situation could be compared with Katrin also.

6 juvenile storks out of 54 overwintered in different areas across Europe. All of them survived the first winter, compared to the only 38% of the juveniles, who travelled to Africa.

To summarise the study: The changing climate brings new possibilities for storks to winter in higher altitudes and successfully survive the winter. It can be even beneficial for the bird because
1) Less demanding-more energy saving. Birds spend less time flying and more time resting and foraging.
2) Food is more easy to get- birds take use of landfills and agricultural areas.
3) Safer- lower risk to hunting and predation.
Although it is said that timing also affected the choice of wintering area- these juveniles hatched and started migration later.

Read the whole study here: https://d-nb.info/1185395784/34
marika.solo
Site Admin
Posts: 10235
Joined: 29 Sep 2021, 09:38

Re: Discussion about migration

Post by marika.solo »

BS with transmitter from CZECH.rep. - RS MAKOV
marika.solo wrote: 12 Jan 2022, 09:28 BLUE
Lukáš, again big thank to you for the interesting and nice 3D animation - big and great work! :D
Flights2 wrote: 11 Jan 2022, 23:42 ... Přinesl nám mnoho zážitků, zajímavou cestou na jih Evropy, přes Středozenmí moře do Afriky, východní trasou. ... Je velmi málo zdokumentovaných přeletů Středozemního moře, které Čáp Černý prokazatelně přežil (co vím, tak je pouze 1 domněnka). ...
1/ Blue don't fly the Eastern route through Turkey, storklet used the intermediate flyway
2/ there are documented more black storks, who successfully crossed the Mediterranean, not only 1 (I know few)
Flights2 wrote: 12 Jan 2022, 15:25 ad1) The stork flew east, I didn't say anywhere that it flew over Turkey. He flew east, because he flew southeast. He didn't fly southwest. The eastern route is east of the imaginary vertical axis from the center of Europe. We talk about Green and Blue like this all the time, until now, suddenly, someone who suddenly names it differently shows up to show something.
ad2) So can you prove the many documented and proven flights of black storks? Storks that have crossed the Mediterranean from shore to shore and are recording data from radios with location and time that it really happened? Not the assumption that one day he was seen there and in the morning elsewhere? Like Timmi (I don't remember his name now) Can you name just three of the many documented storks, as you write, for example? Specifically with the data?
my answers in next posts
1/ to flyways: viewtopic.php?p=916#p916 and next
2/ to crossing the Mediterranean (btw. I wrote few, not many): viewtopic.php?p=918#p918
marika.solo
Site Admin
Posts: 10235
Joined: 29 Sep 2021, 09:38

Re: Discussion about migration

Post by marika.solo »

BS with transmitter from CZECH.rep. - RS MAKOV - continuation

A/ flyways

Image

Orange flew the Western Flyway/western migration route (direction Gibraltar, last data in Spain),
Green flew the Eastern Flyway/eastern migration route (direction Bosporus, but turned back in Bulgaria),
Blue used the southern/intermediate flyway - Mediterranean migration route (via Greece; more known is the route via the Straits of Messina, Italy) - stork don't fly the Eastern route through Turkey.

These are terms used by ornithologists, renowned black stork specialists - from the Czech Republic as well:

"Black Storks Ciconia nigra breeding in Europe use two main migratory routes to winter in Africa: a western route over Gibraltar and an eastern route through Turkey and Israel. ... Although generally they use a western migration route via Gibraltar or an eastern one via Turkey and Israel, a few observations suggest that some birds migrate to Africa through Italy, Sicily and Malta (Janssen et al 2004, Bobek et al 2008, Vrezec et al 2015, www.trektellen.nl/site/totals/1594/2016 – accessed 7 December 2016) and through Greece (the Peloponnese–Kythira–Antikythira–Crete route) (Janssen et al 2004, H. Alivizatos pers. comm)."
source: Literák, Ivan & Kafka, Petr & Vrána, Josef & Pojer, František. (2017). Migration of Black Storks Ciconia nigra at a migratory divide: two different routes used by siblings from one nest and two different routes used by one individual. Ringing & Migration. 32. 1-6. 10.1080/03078698.2017.1332260.
https://www.tandfonline.com/doi/full/10 ... ccess=true, Published online: 13 Jun 2017, Date accessed: 14.01.2022


we have maps already here: viewtopic.php?p=514#p514
marika.solo
Site Admin
Posts: 10235
Joined: 29 Sep 2021, 09:38

Re: Discussion about migration

Post by marika.solo »

BS with transmitter from CZECH.rep. - RS MAKOV - continuation

some sources in Czech language

Územím ČR prochází migrační rozhraní mezi populacemi obou druhů čápů táhnoucími na jihozápad a na jihovýchod. U čápa černého převládá tah na jihozápad u ptáků hnízdících západně od 14° v. d., populace hnízdící mezi 14°–16° v. d. táhne oběma směry, východněji hnízdící ptáci jsou již převážně východotažní. Výjimečně se – spíše mladí nezkušení – jednotlivci obou druhů vydají k jihu přes Itálii. Tato cesta má však pro čápy bílé většinou fatální důsledky, neboť je čeká velice obtížné překonání moře a nehostinné Sahary. Čápi černí jsou díky užším křídlům schopni přece jen překonat větší vodní plochu a v malých počtech protahují přes Sicílii pravidelně. (Jaroslav Cepák)
zdroj: Elektronický časopis Ptačí svět .21, 1
http://bigfiles.birdlife.cz/PS/PS_2014_01.pdf, Date accessed: 14.01.2022

Česká republika leží na širokém tahovém rozhraní a ptáci odtud směřují do afrických zimovišť dvěma hlavními směry – jihozápadním přes Gibraltar a jihovýchodním přes Bospor nebo Dardanely. (František Pojer, Miroslav Bobek, Lubomír Peške)
zdroj: Elektronický časopis Ptačí svět .21, 1
http://bigfiles.birdlife.cz/PS/PS_2014_01.pdf, Date accessed: 14.01.2022

Naše území leží v tahovém rozmezí, kdy ptáci ze západních oblastí republiky (ale ještě i např. z Jeseníků nebo dokonce ze slovenských Malých Karpat) táhnou do afrických zimovišť častěji jihozápadním směrem, tedy přes Španělsko a Gibraltar. Ostatní u nás hnízdící páry migrují tradiční jihovýchodní cestou přes Balkán a Blízký východ.
zdroj: Africká odysea - projekt Českého rozhlasu 2 - PRAHA, Texty: Miroslav Bobek, František Pojer
http://www2.rozhlas.cz/capi/ocapu.htm, Date accessed: 14.01.2022
marika.solo
Site Admin
Posts: 10235
Joined: 29 Sep 2021, 09:38

Re: Discussion about migration

Post by marika.solo »

I know these stories - documented successfully crossing the Mediterranean Sea (juvenile black storks)

1/ 2015 Feja (juvenile BS female hatched in Latvia)
- https://goris.lv/en/feja-made-it/ (Dr. Māris Strazds)
- https://goris.lv/en/how-to-cross-mediterranean/ (Dr. Māris Strazds)
- map: https://www.movebank.org/cms/webapp?gwt ... 999999,z=4
Published online: 27.10. and 29.10.2015, Date accessed: 14.01.2022

2/ 2017 to 2019 Lamic (Germany): with two most notable crossings of the Mediterranean Sea and the Sahara
(added on 21.07.2023)
map https://1.bp.blogspot.com/--wDidG8iGTg/ ... c_2019.png
-source: (https://blackstorknotes.blogspot.com/20 ... rchen.html) (Carsten Rohde)

3/ 2018 Woodek/WHITE - BIAŁY (juvenile BS hatched in Poland)
click https://i.postimg.cc/T1d7pRsr/2018-10-2 ... g-path.jpg
(source: FN BocianiMy https://www.facebook.com/photo/?fbid=37 ... 9129010304 + https://www.facebook.com/BocianiMy/phot ... 98/?type=3)

4/ 2020 Aleko (juvenile BS from Greece)
- https://www.zoosos.gr/i-istoria-tou-meg ... z79kRWrtDX
Published online: 27.10.2020, Date accessed: 14.01.2022

5/ 2021 Udu (juvenile BS hatched in Estonia)
- https://www.google.com/maps/d/viewer?mi ... 999994&z=6
(tracker map by Juta www.looduskalender.ee/forum/viewtopic.p ... 63#p833363)
Published online: 27.10.2021, Date accessed: 14.01.2022

6/ 2021 Blue (juvenile BS hatched in Czech.rep. - RS Makov)
Post Reply

Return to “Discussion about migration”