Small, dark creatures, which fly about erratically. They congregate in huge groups at the entrances of caves. Though difficult to hit, they can be killed with arrows. Groups of bats are only found in both entrances of Dirge's cave and the pit that Wander finds Celosia in. They do no harm to Agro or Wander, but instead simply fly nearby/around them until they move on.
Check the cave tunnels leading to and from Dirge's cave to find a few groups of bats.