One of the most endangered species is the little flycatcher. “Over the last forty years, its numbers have fallen by as much as ninety percent in some places, which is why it is one of the species that we currently deal with systematically,” said ornithologist Daniel Křenek from Český Těšín.
According to him, there are several reasons why these small birds are declining. “It doesn’t help Lejsk that the old beech forests are disappearing. He needs extensive forest stands, so when mining creates smaller islands, he also minds. And the barking disaster didn’t help the situation either. “
In the Beskydy Mountains, ornithologists counted lower numbers of capercaillie grouse. “This is due to a change in the use of forest stands and intensive management,” explained Václav Tomášek from the Beskydy Protected Landscape Area Administration.
Rattlesnake pays for intensive agriculture
Another species whose population has greatly declined is the woodpecker. “The biggest problem for him is intensive agricultural management,” Křenek explained. “Rattlesnakes nest in the meadows and at the time they are sitting on the eggs, the farmers are starting to mow. Most nests are thus destroyed and reproduction is declining. ”
In general, however, according to experts, large landscapes and climate change do not benefit birds either. “The weather affects the development of the number of insects, and thus birds may lack food,” said Křenek. However, due to climate change, bird habitats are also changing. “In our region, the mountain blackbird occurred at an altitude of 700 to 900 meters. Today it is 800 meters and higher and the area of occurrence has shrunk, “said ornithologist Tomášek.
New species also appear, sometimes with problems
While some species in the Moravian-Silesian Region are disappearing, others have emerged. “In recent years, we have seen the occurrence of Nile geese, which come from Africa. Unfortunately, it started to displace the original species, “stated Křenek.
“Of the new species, it is quite often possible to see a Mandarin duck,” added Václav Tomášek. It is possible to see this bird in the vicinity of Ostrava or in Poodří, where, unlike the goose, it does not harm the original species.
In some places, ornithologists have also managed to record the return of species that some time ago disappeared from the region. “There is a positive trend for more species of predators. For example, the sea eagle or the peregrine falcon. After a long time, they returned to the Beskydy Mountains, “said Tomášek.
Ringing brings interesting information
Rock eagles were also observed in the Beskydy Mountains. “Some time ago, ornithologists from the Novojičín region tried to land them again,” Křenek described. “But it is also due to the fact that their population in Slovakia has increased and young eagles are now looking for new nesting grounds.”
In addition to monitoring the number of birds, ringing ornithologists also help to find out a lot of other information. “Even with some species, we still lack basic knowledge about how long they live, where they nest, whether couples are together all their lives or where they fly for the winter season,” Křenek said.
For small ornithologists, ornithologists originally assumed that they wintered in completely different localities. “We thought they were flying to Africa, but it turned out that they were flying to the area in India and China,” Křenek explained. “We achieved this in cooperation with Palacky University in Olomouc. We managed to get the geolocators that we put on the birds. “