Baital

Baitals, also known as Vetala, are a fictional species originating in Indian folklore.

Description
Baitals are wandering spirits of evil men caught between life and death, who appear as small batlike humanoids. The Baitals are able to cause miscarriages or kill children. Baitals are also able to merge with a recently deceased corpse, producing a larger, emaciated creature capable of speech (and fond of riddles).