The state is providing limited cave access as part of a pilot program. The caves were originally closed because of a bat disease called white nose syndrome.
The northern long-eared bat is found in Indiana, throughout the Midwest, Eastern U.S. and parts of Canada.
The number of female Indiana bats is expected to drop to less than 30,000 in the next decade.
White Nose Syndrome has killed some bats in Indiana, but experts say the number of deaths is lower than levels seen in the Northeast.
White Nose Syndrome is not only devastating news for researchers, but also for Indiana residents.