Halloween Special: Real-Life Vampires Hunt With Stealth

October 30, 2013—Armed with sharp teeth, a blood-lapping tongue, and an anticoagulant in its saliva, the vampire bat's attack is so subtle that it can sometimes feast undetected. Daniel Streicker, a National Geographic grantee and University of Glasgow research fellow, explores the bats' sophisticated hunting strategy. (Some of this footage is a demonstration in a controlled laboratory environment.)