Vampire bats really do drink blood. They feed on the blood of birds, cattle, horses, and pigs ... and the occasional sleeping human.

They need to consume a few tablespoons of blood every day. If the vampire bat doesn't eat for more than a few days it will starve. They can only be found in Central and South America.

Irish writer of horror tales Bram Stoker was so fascinated by these bats that drink blood, that he incorporated them in his book 'Dracula.'