Observations on the Bat Fauna (Mammalia: Chiroptera) of Roşia Montană (Romania)The observation and identification of some bat species of the families Rhinolophidae and Vespertilionidae from Roşia Montană led to the completion of the list of the bat fauna, known from this locality, to a number of 12 species. This fact proves a certain state of the ecosystem complex from Roşia Montană, knowing that the bats are good indicators of the biodiversity state of an area. The bat species identified by the authors and added to the species list for Roşia Montană are:Rhinolophus hipposideros, Myotis brandtiiandPipistrellus (=Hypsugo) savii. Rhinolophus hipposiderosis included in the Annex II of the Directive of Habitats, and it is a key species in the National Programme for Bat Monitoring.