The Upir was a Vampire of Russian folklore. They operate during daylight hours unlike most Vampires which are burnt by daylight. They eat the children of the family first and then they eat the parents. There are many variations of the name in different Eastern European languages. It was believed that the Upir was a corpse that had become possessed by the Devil. At night they slept in graveyards, occupying the graves of those who were unfaithful.