 It is known for its extreme life expectancy relative to its body size, approximately twice that of humans.The Brandt's bat holds the record for oldest bat recorded; in 2005, a bat was discovered in a cave in Siberia that had been banded in 1964, making the bat at least 41 years old.The species was described in 1845 by German zoologist Eduard Friedrich Eversmann, who placed it the genus "Vespertilio".