1. Department of Zoology and Animal Ecology, University of Life Sciences in Lublin, PL 20-950 Lublin, Poland
2. Institute of Biological Sciences, University of Zielona Góra, Prof. Szafrana St. 1, PL 65-516 Zielona Góra, Poland
3. Faculty of Environmental Sciences, Czech University of Life Sciences Prague, 165 00 Prague, Czech Republic
4. Institute of Nature Conservation, Polish Academy of Sciences, PL 31-120 Kraków, Poland