Cavities in the rock walls are habitats of great naturalistic importance, as they host a specialized fauna mainly made up of invertebrates and bats, such as the greater horseshoe bat, the lesser horseshoe bat, Kuhl's pipistrelle and the dwarf fruit-eating bat, sometimes gathered in colonies in the caves. Among the amphibians, the rare geotriton frequents the cave entrances. Bats are mammals that hibernate in winter and use holes in trees and caves or cavities in rock walls as shelters. They can also colonize anthropic environments such as abandoned buildings or spaces under the roofs. If you are lucky enough to find them in a cavity like this one, it is important not to disturb them and not to touch them, especially during their hibernation in the winter period.