Vampire bats' 'thermostat' helps them find ripe prey, study finds

Vampire bats have developed a special protein that serves as a temperature sensor to guide them to the warm spots on their prey where there are likely to be blood vessels, a study has found. Among vertebrates, only vampire bats and three types of snakes have this sense.Vampire bats like it warm: To home in and bite with fanged efficiency, they've developed a temperature sensor to guide them to their prey, a new study has found.