SEEN - SE European Bird Migration Network
Directional preferences of Acrocephalus warblers in the Czech Republic
Petr Prochazka(1), Richard Policht(2) & Jiri Reif(2)
1) Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, Kvetna 8,
CZ-60365 Brno, Czech Republic
2) Department of Zoology, Faculty of Science, Charles University, Vinicna 7, CZ-12844 Prague, Czech Republic

We studied directional preferences of three Acrocephalus warblers at four sites in the Czech Republic in 2001–2003. Of a total of 375 tests, 335 were carried out in summer (July–August) and 40 in spring (May). Birds were tested shortly after their capture with Busse’s orientation cages for 10 minutes. The majority of experiments (74%) were done on the Reed Warbler (Acrocephalus scirpaceus). Mean vectors of individual birds for each site showed high orientation scatter. Significant results were obtained only for the Reed Warbler when excluding experiments carried out during overcast. Reed Warblers tested in summer showed mean directions heading SSW–SW. We found no significant intraspecific differences in the mean headings among the study sites.

The attendance at the workshop was supported by the foundation Nadani Josefa, Marie a Zdenky Hlavkovych.
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