Vampire in folklore, animated corpse that sucks the blood of humans. Belief in vampires has existed from the earliest times and has given rise to an amalgam of legends and superstitions. They were most commonly thought of as spirits or demons that left their graves at night to seek and enslave their victims; it was thought that the victims themselves became vampires.
Werewolves are only second to vampires in terms of popularity. Perhaps, like vampires, belief in humans that turn into wild predatory (and sometimes, nocturnal) animals exists in all major world cultures. Many psychologists attribute this to the natural animal instinct that resides in the psyche of all men, an instinct that existed since the dawn of mankind.
