Where do Polish black storks winter?
For the first time, we present a summary of the wintering places of Polish black storks in a very large test, as up to 50 individuals arrived in the winter camps in 2017-2023. Unfortunately, only every second stork out of more than a hundred storks equipped with GPS-GSM loggers arrived at winter storage; the rest probably died on the way for various reasons. 79% of storks overwinter in Africa between the 4th and 16th equinoxes,
but mainly in the #Sahel region.
21% of birds chose #Little Asia and Southern #Europe for their winter stop. More than half of the storks flew the eastern path and wintered in #East Africa, most in #Ethiopia (N=15) and #Sudan (N=7). In West Africa, #Senegal and #Mauretania are the most frequently selected countries.
It only happened once that a Polish black stork wintered UNDER THE EQUATOR near #Victoria in Tanzania in December 2022. It was a truly unique individual from the #ArcheryArchery 2021 who spent his first winter in Sudan. He returned first to Ukraine in the summer of 2022 and to central Poland in June. In the fall he traveled more than 9,000 kilometers to fly beyond the equator! In the context of climate change, there are very interesting cases of wintering birds in southern Europe. However, three cases of winter camps in #Italy tend to concern individuals who either did not have enough strength (and courage) to fly the southern path over the open sea or migrated too late (Grzegorz).
Polish black storks arrive in winter fields in October and November, leave in April and May. The exception is wintering birds in Europe, which began their spring migration much earlier, in March (Skierka and Cuba). Favorite places in winter are the extensive river valleys, ditches and canals as well as the regularly formed waterfalls. Most individuals returned to their chosen winter destinations in the following years. However, some traveled long distances in search of more attractive places. The record breaker in #Nigeria traveled almost 800 km SW in the winter, presumably escaping #Harmattan, a strong and dry northeasterly wind that blows across the #Sahara towards #Guinea, in December.
#SGGWLZDwRogowie #BocianiMy
https://www.facebook.com/BocianiMy
©D.Anderwald
©D.Anderwald
©D.Anderwald