Chiroptera (anime)

Chiropteras are bat-like creatures in the anime movie Blood: The Last Vampire. Thier true origins are not known but some of it was later explained in the following anime series, Blood+. They were used by the U.S. military as a sort of biological weapon.

The chiropteras possessed extraordinary speed, powerful strength, unnatural healing abilities and can take the form of ordinary humans. They are also capable of contorting or transforming various body parts in order to fly or have longer limbs. They feed off of fresh human blood.

The only way to exterminate them is to induce profuse bleeding by slicing them with a sword or a similar device. In the anime series, only Saya's blood can petrify and destroy them.