Migration is a survival element of certain bird species. By migrating, birds take advantage of favourable nesting conditions in the North and escape southwards from unfriendly winter environments.
This graduate thesis bases on data analysis of ringed birds on the territory of Slovenia from 2005 to 2007. Emphasis is placed on seasonal migration dynamics of the garden warbler (Sylvia borin) in the year of 2006. We wanted to discover during which month are garden warblers most common. It turned out that in Slovenia the largest number is observed in August.
Apart from providing findings about migration dynamics, a part of this thesis is devoted to enumerating indicatorial bird species related to Sylvia borin from 2005 to 2007. These were collected together with garden warbler in more than 50% of the cases, the most common being Eurasian blackcap and European robin. They helped us to define migration dynamics for Sylvia borin.
This work also includes theoretical discussion where we attempt to explain why and when birds migrate and what types of migration we know. Because the research uses ringing data from Slovenian centre for Bird Ringing, a part of Slovenian Museum of Natural History, types of bird rings, beginnings of ringing in Slovenia and abroad, and bird ringing in general are described as well. This is followed by a short explanation of bird collection devices, especially nylon nets used for smaller animals. Description of the garden warbler, its properties and unique features and last but not least, identification keys, are also included.
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