Indianapolis, IN – As temperatures begin to fall across Indiana, the Indiana Department of Natural Resources (DNR) is spotlighting the state’s bat populations during Bat Week 2025, emphasizing how these nocturnal mammals adapt to the colder months ahead.
According to the DNR’s Division of Fish and Wildlife, some species such as the hoary bat migrate south toward warmer regions, while others — including the tri-colored bat — enter hibernation in caves or old mine shafts across the Midwest. The agency’s biologists conduct winter hibernacula surveys to track bat numbers and ensure populations remain healthy throughout the season.
This annual monitoring helps scientists understand the effects of habitat loss, white-nose syndrome, and climate change on bat survival rates. Officials note that contributions to Indiana’s Nongame Wildlife Fund directly support ongoing research and conservation efforts statewide.
Residents are encouraged to learn more about local bat species and migration patterns at on.IN.gov/bats and to take part in Bat Week by supporting conservation programs or installing bat houses to promote safe roosting habitats.
