Vampire bats in Brazil have been found to be drinking human blood.
It was previously believed that they would only sink their teeth into birds, but now scientists have found their taste is far more varied, the Daily Star reported.
Researchers found DNA traces of human blood in the faeces of vampire bats in Brazil, sparking health fears as they carry rabies.
Fifteen samples were taken from the bats, and out of those, three showed human blood traces.
Enrico Bernard from the Federal University of Pernambuco believes the bats may have moved on to humans because as people move into the habitat of guans and tinamous birds, they are disappearing.
He warned that the situation must be monitored to find out how and when humans are attacked by the bats.
David Becker from the University of Georgia also warned that their bites could be fatal if the bats are infected with disease.