Vampire bats running at Jeff's blog. I'd add to his comments that bats wings are another great example of convergent evolution. Bat's wings are mostly highly developed and specialized webbed hands which evolved independently of bird wings. Hence, the name of the bat order Chiroptera (Hand wing).
Vampire bats are in the suborder Microchiroptera which means, among other things, that they use echolocation (megabats do not). There are only three species of sanguivorous (vampire) bats, each in different genuses in the leaf-nosed bat family (Phyllostomidae). All three species of vampire bats are limited to the new world south of Mexico. In Belize, there is the
Greater False Vampire Bat (Vampyrum spectrum) which I hope to see sometime. It is unclear if Riskin, the author of the study that has us buzzing, has tested this species for the ability to run.
Lastly, let us remember that the bible specifically says that bats are unclean animals which we should not eat since they cheweth not the cud nor divideth the hoof (Leviticus 11:19).