First found in 2008, the 2-inch-long (5-centimeter-long) amphibian is known to live only in southern Vietnamese cloud forests, where it uses webbed fingers and toes to glide from tree to tree.

Adults deposit their eggs in water pools in tree trunks, which protects their offspring from predators lurking in rivers and ponds.

"It has absolutely no reason to ever go down on the ground," said study leader Jodi Rowley, an amphibian biologist at the Australian Museum in Sydney.

However, that trick isn't what earned the species its bloodsucking name. Rather, it's the strange curved "fangs" displayed by its tadpoles, which the scientists discovered in 2010.

"When I first saw them by looking through a microscope, I said,