In Serbian folklore, a sorceress who harbors a demonic spirit which leaves her body during sleep. It assumes the shape of a bird or butterfly and flies around houses, feeding upon people, especially children, whom she finds asleep, tearing out their hearts and devouring them.
- Bonnerjea, Biren. (1920). A Dictionary of Superstitions and Mythology. Thomson Gale.
- Monaghan, Patricia. (1981). Book of Goddesses and Heroines. New York: Dutton.