We all know the undead will hunt you down in the night. But nature can also suck. So before you plan your next camping trip, there are a couple of critters we think you should meet.
Cheap shot, but let's start with the Vampire Bat, the only mammal to dine exclusively on blood.
The Vampire Finch
The Vampire Finch of the Galapagos Islands pecks away at host birds when times are lean.
The Vampire Moth
Bats are almost cute compared to the Vampire Moth, which has evolved to survive on a diet of human blood.
The Vampire Squid
The Vampire Squid doesn't exactly drink blood, but gets its name from its cool bat-like sheath.
There are, however, blood-sucking water creatures you never want to meet. The tiny Amazonian candirú fish has been known to swim into the human urethra for sustenance. Dude, sorry: consider yourself warned.