Hollow-faces are ruddy bats that make their home in the mountains near
Riparia. They’re attracted to the volcanic heat that emanates from the region and often roost in extinct lava tunnels and warm pockets. Their faces resemble these volcanic tunnels, with craggy foreheads, cavernous nostrils and eye wells so deep it almost seems they don’t have eyes at all. They grow around eight inches long with a two-foot wingspan. Hollow-faces are known as one of the gentlest and most maternal of bats, nursing even the sick and injured of their species in specialized infirmary roosts. They’ve been known to successfully rear premature pups and set broken wing bones.