Identifying vampires

While most people can name several elements of vampire lore, there are no firmly established characteristics. Some vampires are said to be able to turn into bats or wolves; others can't. Some are said not to cast a reflection, but others do. Holy water and sunlight are said to repel or kill some vampires, but not others. The one universal characteristic is the draining of a vital bodily fluid, typically blood. One of the reasons that vampires make such successful literary figures is that they have a rich and varied history and folklore. Writers can play with the "rules" while adding, subtracting or changing them to fit whatever story they have in mind. Finding a vampire is not always easy: according to one Romanian legend you'll need a 7-year-old boy and a white horse. The boy should be dressed in white, placed upon the horse, and the pair set loose in a graveyard at midday. Watch the horse wander around, and whichever grave is nearest the horse when it finally stops is a vampire's grave — or it might just have something edible nearby; take your pick.