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Migratory behaviour of Czech blackcaps (Sylvia atricapilla)
 Valečková, Dominika ; Hořák, David (advisor) ; Procházka, Petr (referee)
Avian migratory behaviour has changed recently due to several factors including climate change. In many species of birds their wintering areas have become to move and their migratory paths have shortened. The Blackcap (Sylvia atricapilla), species with migratory divide located in the Czech Republic, established a new migratory path and a new wintering area on The British Isles within a few generations. This shorter route provides many benefits such as sooner return to breeding ground and occupying better territories, and lead to rapid growth of the number of individuals wintering there. Other changes in morphology (e.g. length of wings and bill, colouring etc.), ecology and ethology (e.g. earlier nesting accompanied by assortative mating etc.) are linked to this new migratory behaviour. The aim of this thesis is to analyse the ringing and mist netting data and compare the results with the published data, confirm existence of this migratory behaviour in our breeding population and obtain support of some related hypotheses. My results confirmed the existence of this new behaviour in our breeding population of blackcaps. During the period 1934-2020 Czech blackcaps changed their migratory behaviour in favour of a new route to The British Isles. Number of wintering blackcaps in these areas started to...
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