Bat

A bat is a nocturnal animal found on Earth that is feared by some humans for the thought that they drink blood, but only some sub-species of bats do, in fact, drink blood.

Many Vampire legends tell of Vampires turning themselves into bats and back into their true forms.

Florence Stoker had the ability to control bats and used them to block the sunlight, allowing her to go outside during the day. (DWAM: Bat Attack!)

At one point, bats lived in the Cloister Room of the Doctor's TARDIS. (DW: Doctor Who)

One species of bat was native to Androzani Minor. (DW: The Caves of Androzani)

The Screamers were bat-like creatures native to Desperus. (DW: The Daleks' Master Plan)

The Tetraps resembled bats in their appearance, and they also slept upside down just like bats. (DW: Time and the Rani)