Hahahahaha!
Snakes & Vampires...hmmm, no wings, no funny accent, they dont suck blood, and they dont wear capes. Although there is the nocturnal thing, the fangs, and the strength, but Im not sure thats enough to be anywhere near a Vampire.
I would put Vampire Bats at the top of the list and Leaches, and Wood Ticks at the bottom of the list...but no Snakes.