It found that when the vampire bats became isolated in a roost, pairs unfamiliar with one another - but in close proximity - would begin grooming, then "mouth-licking" before swapping food.

A common vampire bat going out for its nocturnal hunt DNA analysis is giving clues to how the vampire bat can survive on blood alone. The bat can drink up to half its weight in blood a day unlike ...

Vampire bats made to run on treadmills in a lab reveal ... another bat of the colony may transfer portions of its blood meal by mouth, scientists say. The Independent is the world’s most free ...

Vampire bats made to run on treadmills in a lab reveal ... another bat of the colony may transfer portions of its blood meal by mouth, scientists say.