Worthy representative of the many bat species, the Lesser Horseshoe Bat (size 4cm, 22cm wingspan, weight 6g) has established on the plateau of Vachères, one of the last bastions of Provence. In winter it occupies favourable underground cavities, such as the sinkhole of the ladder. It starts to hunt between 15 and 30 minutes after sunset. It identifies insects at short distances and captures them most often in flight.