If a vampire bat doesn't drink its own weight in blood in one night, it will die of starvation, so if a bat fails to get enough blood, other bats will share
Well, That Sucks: Vampire Bats Found Drinking Human Blood | Live Science
Vampire bats have been caught sucking human blood for the first time
Lost Genes Explain Vampire Bats' Diet of Blood - Scientific American
Scientists Solve Mystery of How Vampire Bats Feed on Blood Without Becoming Sick
Vampire Bat
Bloodthirsty Behaviour | New Trail
Why Do Vampire Bats Have A Taste For Blood? – The Chicago Council on Science and Technology
Vampire bats and Gila monsters inspire medical research for stroke and diabetic patients - pennlive.com
Turning Vampire Myths Upside Down (Or Right Side Up) - Bat Conservation International
How we discovered the vampire bats that have learned to drink human blood
Lost genes may help explain how vampire bats survive on blood alone
Vampire Bats Form Bloody Bonds Of 'Friendship' : NPR
Vampire Bats Know Sharing Blood With Friends Is Good Manners - The New York Times
Vampire bats are terrorizing Brazilians as they sleep
Ranchers' war on vampire bats exacts unintended environmental toll
Vampire bats: Scientists work out why they love blood - BBC Newsround
How Vampire Bats Suck Blood for 30 Minutes Unnoticed - YouTube
Vampire Bats Suck Blood - Fact or Myth?
Do vampire bats really drink blood? | Highlights Kids
Vampire bats have developed a taste for human blood