The baobhan sith is a female vampire in the folklore of the Scottish Highlands, though they also share certain characteristics in common with the succubus and fairy. They appear as beautiful women who seduce their victims before attacking them and draining their blood.
According to the Scottish folklorist Donald Alexander Mackenzie, the baobhan sith usually appears as a beautiful young woman wearing a long green dress that conceals the deer hooves she has instead of feet. Like other vampires she drinks the blood of human victims and will vanish with the rising sun. She may also take the form of a hooded crow or raven.
There are numerous stories about the baobhan sith with a general theme of hunters being attacked in the wilderness at night. In one tale recorded by Mackenzie, there were four men who went hunting and took shelter for the night in a lonely shieling or hut. One of the men supplied vocal music while the others began dancing. The men expressed a desire for partners to dance with, and soon after that four women entered the hut. Three of them danced while the fourth sat beside the vocalist. He then noticed drops of blood falling from his companions and fled from the hut, taking refuge among the horses. His vampiric partner chased him but was unable to catch him, and when daylight came she disappeared. The man went back inside and found all three of his friends dead and drained of blood. The folklorist Katharine Briggs suggested that the baobhan sith was unable to catch the fourth man among the horses because of the iron with which the horses were shod, iron being a traditional fairy vulnerability.
In a similar tale one of the men noticed that the women had deer hooves instead of feet and fled from them. He returned the next morning to find that the other hunters had their “throats cut and chests laid open”.
In a third story the hunters took refuge in a cave. Each of the men said he wished his own sweetheart were there that night, but one of them, named Macphee, who was accompanied by his black dog, said he preferred his wife to remain at home. At that moment a group of young women entered the cave, and the men who had wished for their sweethearts were killed. Macphee was protected by his dog who drove the women from the cave.
One recurring motif in these stories is that the baobhan sith appear almost immediately after the hunters express their desire for female companionship. This is connected with a traditional Scottish belief that if one were to make a wish at night without also invoking God’s protection, then that wish would be granted in some terrible manner.