One Old Bat
. . . and I’m not talking about your Grandmother!
This male little brown bat was banded in April 1983 making it at least 32 years old in February 2015 when it was last recovered. There is no way to age bats after they reach adulthood (several months after birth), so this bat could have been a yearling born in the summer of 1982, or already several years old in 1983. The bat was banded by Gerda Nordquist and Elmer Birney of the Minnesota DNR in the same site as it was recovered.
Assuming this bat has eaten its weight (6 grams) in insects every night during its active period for the past 32 years, we estimate it has consumed roughly 13,977,600 mosquito-sized insects!
Source Article: http://content.govdelivery.com/accounts/WIDNR/bulletins/f52bbf