Egyptian fruit bat their days roosting in trees or caves, often with large groups of other bats, sometimes numbering in the thousands. They emerge from the roost to forage for food in the late evening, and return just before dawn. They hang upside down, with their wings folded closely around their bodies. Egyptian fruit bats, along with other species in the genus "Rousettus", are the only megachiropterid bats to use echolocation, which they accomplish by emitting a series of sharp clicks with their tongues. The clicks are normally slow and constant, but these clicks speed up dramatically when the bats approach an object.
Vampire Bats (film) more student is killed in the pool by the bats. Maddy rushes to find a solution while learning that the bats' mutation is an indirect result of toxic waste that contaminated the local water source, creating mutations in the deer that the bats feed on, thus making the bats too mutants. Meanwhile another group of bats is found in a church (yet still not the whole population). Maddy's students accidentally find out that the bats are attracted to loudspeakers or anything that emits sounds similarly, as they mistake those sounds as reflected ultrasounds. They decide to set a trap in