Before the end of the 19th century, the Greeks believed that the corpses of werewolves, if not destroyed, would return to life in the form of wolves or hyenas which prowled battlefields, drinking the blood of dying soldiers. In the same vein, in some rural areas of Germany, Poland and Northern France, it was once believed that people who died in mortal sin came back to life as blood-drinking wolves. These "undead" werewolves would return to their human corpse form at daylight. They were dealt with by decapitation with a spade and exorcism by the parish priest. The head would then be thrown into a stream, where the weight of its sins was thought to weigh it down. Sometimes, the same methods used to dispose of ordinary vampires would be used. The vampire was also linked to the werewolf in East European countries, particularly Bulgaria, Serbia and Slovenia. In Serbia, the werewolf and vampire are known collectively as vulkodlak.