1. Institute of Forest Ecology, Slovak Academy of Sciences, Zvolen, Slovakia; e-mail:
2. Slovak Bat Conservation Society, Vrchslatina, Hriňová, Slovakia
3. Faculté des Sciences, Université catholique de l'Ouest (UCO), Angers, France
4. Poľana Protected Landscape Area, State Nature Conservancy of the Slovak Republic, Zvolen, Slovakia