Storks are leaving for Africa early this year. No worry - it doesn`t foretell severe winter. :):):)
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Young storks leave Poland earlier than usual
In many stork nests, there are no more young ones - they flew away a week ago, but their parents will wait another 1-2 weeks, resting in the silence of an abandoned nest. There are a lot of young this year, although the birds arrived later - says prof. Piotr Tryjanowski from the Poznań University of Life Sciences.
In the past, it was believed that bird families leave together, and the young learn how to travel from adults. Yet, the younger ones, those with a gray-orange beak and legs, mobilize much earlier than the older ones, with intensely red beaks. Siblings don't necessarily wander together.
However, first of all, adult birds that have not had offspring or have lost them - usually due to predators, fights with other storks or due to weather and random causes (fall of a pole with a nest, thunderstorms, hail) depart first.
- This year everything is different. The storks arrived late, but they did their parental work very efficiently. The number of young in many places in Poland is therefore above average, our pessimistic visions from the beginning of the breeding season definitely did not come true - says Prof. Tryjanowski.
The assumption that the birds will leave later than usual is also not confirmed. For reasons that are difficult for researchers to explain, storks "curl up" about 10 days or two weeks earlier than the normal long-term average. It has nothing to do with a potentially cold winter - scientists once tried to check the relationship between the stork's departure time and the harsh winter, but they have not been proven; the data was a "chaotic cloud of points
The phenomenon of "stork assemblies" can be observed on plowed fields and mown meadows. "If there are 30-40 storks feeding in the field, it is a clear sign that they are gathering to depart. Flight is a very expensive way of moving and you need to prepare yourself energetically for it. That's why planes refuel at the airport, and storks find a place where there is more food to fill up before the journey to African wintering grounds" - explains Prof. Tryjanowski.Stork assembly called Little Parliament in Polish