barbastella barbastellus colony

alone animal awake barbastella barbastelle barbastellus bat bats biodiversity black cave cavern caving characteristic climb close cold colony conservation creepy dark dracula ears forearms forest gallery gray grouped groups habitat habitats halloween hanging hibernating hibernation hiding interesting interior lethargic mammal many mystery nature night nose protected relaxed rocks rocky romania romanian scary science shiny sleep species speleo speleology stone time underground vampire western wilderness winged wings winter