First 'Vampire' Bat Fly Fossil Discovered

A one-of-a-kind fossil shows that so-called bat flies — tiny vampire insects that survive on the blood of bats — have been parasitizing the winged mammals and spreading bat malaria for at least 20 million years, scientists report in a pair of studies today.
"Bat flies are a remarkable case of specific evolution, animals that have co-evolved with bats and are found nowhere else," George Poinar, a zoologist at Oregon State University who led the studies, said in statement.

Source: Discovery News