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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Winter roosts of Rooks (Corvus frugilegus) and associated Jackdaws (Corvus monedula): social behaviour and interseasonal dynamics
 Hofmanová, Martina ; Musilová, Zuzana (advisor) ; Šťastný, Karel (referee)
The presented work summarizes the literary knowledge of the collective winter sleepovers for Rook Corvus frugilegus and Jackdaw Corvus monedula, particularly focusing on the behavior during the day to revaluate the potential benefits of the causes of mass sleepover. Both species are migratory birds which have migrated throughout most of Europe. Rook is from Corvus genus and it is very kind, very social, preferring nesting gathering food in the colonies. It is synanthropy, which shows strong binding to areas inhabited by humans. He uses mass sleepovers and regularly fly between sleapover and food source. The work also includes analysis of own results mid season dynamics of Rooks and Jackdaws in traditional sleepover base in Kralupy nad Vltavou and their neighborhood. The results show a decrease in Rooks and Jackdaws. Among the main consequences of the decline of these specieslikely include changes in the landscape caused by natural phenomena in the form of floods, loss of agricultural land farmed soil, urban modernization, increasing development and by changing of climatic conditions.
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