greater mouse-eared bat, myotis myotis, in the nature cave habitat, cesky kras, czech rep. underground animal sitting on stone. wi

animal biodiversity black brown cave caving cesky climb close closeup colony conservation czech dark darkness deep detail down dracula ecosystem flight greater habitat hanging hibernate interior kras little mammal mouse mouseeared mouth myotis nature nocturnal over protection rock scary science sitting sleeping speleology stone underground vampire wall wild wilderness wildlife wing winged