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National Repository of Grey Literature 1 records found  Search took 0.00 seconds. 
Autumn Eurasian Crane (\kur{Grus grus}) migration passage across the Czech Republic with special focus on the south-west Bohemia region
 MILLEROVÁ, Adéla
The common crane (Grus grus) is a migratory bird which was earlier considered as a rarely migrating kind in the Czech Republic. Currently here migrate up to several thousand individuals of common crane. Common cranes in Europe use two main migration routes - eastern and western. The eastern migration route runs from Finland and north-west of Russia through Hungary to northern Africa. The west migration route, which is also used by cranes nesting in the Czech Republic, runs from Norway, Sweden and Finland through Germany and France to Spain. During the migration, cranes stop at a gathering point where they have a rest and search for food. One of the best-known gathering points of common cranes is located in Hungarian national park Hortobágy. Phenology of migration is generally influenced by a broad spectrum of factors. In the last decade distinct changes of migration behaviour of this kind have been recorded. It probably comes to interconnection between eastern and western migration routes. A part of common cranes deviates from the eastern migration route, and at the same time migrates through the Czech Republic and connects to the western migration route. The aim of this work was to work out an overview of phenology of migration and to analyse available data on the migration of cranes in Southwestern Bohemia and adjoining areas (Bavaria, Upper Austria). The results show that it comes to increase in numbers of observed individuals of cranes in Southwestern Bohemia. When migrating through our territory, the cranes mostly prefer north-western flight direction. These results show that it probably comes to interconnecting of the eastern and western migration route. The average date of cranes passing through our territory over the years 2010 to 2019 has not changed demonstrably. The average daily temperature had a marginally significant effect on the passage of individuals of common cranes through our territory. The number of individuals passing through our territory between the census dates in the Hortobágy national park was demonstrably influenced by the date (period) of the passage.
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