Vampire bats create a slit in the ankles of sleeping livestock and lick the wound. Their saliva contains an anticoagulant that keeps the wound bleeding. Human

Vampire bats create a slit in the ankles of sleeping livestock and lick the wound. Their saliva contains an anticoagulant that keeps the wound bleeding. Humanoid vampires are not real despite the goth look still being a thing unless you are referring to the group of people that transfuse blood from young people for a lot of money which I suspect is a scam due to the short life of blood cells especially when stored outside of a human.