- any of a family (Desmodontidae) of tropical American bats that live on vertebrate blood, esp. of stock animals, and sometimes transmit rabies and a trypanosome disease of horses
- any of various other bats mistakenly believed to feed on blood
- Any of several bats of the subfamily Desmodontinae, found in subtropical and tropical regions of the Americas, that bite mammals and birds to feed on their blood and that often carry diseases such as rabies.
- Any of various other bats, as those of the family Megadermatidae, erroneously believed to feed on blood.