Got Nature? Blog

MyDNR, Indiana’s Outdoor Newsletter: While temperatures were frigid, conditions were perfect for DNR mammalogists to conduct surveys for rare and endangered bats. About half of the bat species found in Indiana avoid the cold by seeking out climate-controlled caves where they can hibernate.

Image credit: Indiana Department of Natural Resources

During this time, biologists count bats to get a snapshot of roughly how many of each species are present. Conducting surveys regularly provides a better understanding of population trends over time and conducting them at the same time every other year helps to minimize disturbance. The surveys primarily target the Indiana bat, but also include counts for the gray bat, little brown bat, tricolored bat, and big brown bat.

Donations to the Indiana Nongame Wildlife Fund help the DNR purchase equipment needed for surveys. One critical tool is digital cameras which enable biologists to spend less time in caves disturbing the bats and more time in the office viewing photos to obtain a more accurate count.

While the data is still being tallied for the 2026 winter bat count, the impression DNR mammalogists have from this winter’s surveys is that multiple bat species continue to show signs of population growth.

Want to help bats? You can give them the best chance to thrive by growing native plants, installing bat houses, protecting forested habitat, and minimize disturbance to bats. 

To subscribe to the newsletter, visit MyDNR Email Newsletter.

Resources:
Hardwood Ecosystem Experiment (HEE) Highlights: Bats, Video, Purdue Extension – Forestry and Natural Resources (FNR) YouTube Channel
Bats in the Belfry, Purdue Extension – FNR Got Nature? Blog
Ask An Expert: Bats on the Hardwood Ecosystem Experiment (HEE), Video, Purdue Extension – FNR Facebook
Bats in Indiana, Indiana Department of Natural Resources (IN DNR)
Bat Houses, Bat Conservation International
Creating a Wildlife Habitat Management Plan for Landowners, The Education Store, Purdue Extension’s resource center
The Hardwood Ecosystem Experiment (HEE): Indiana Forestry and Wildlife, The Education Store
Subscribe to Purdue Extension-FNR YouTube Channel
Unexpected Plants and Animals of Indiana: Indiana Bats
Selecting a Nuisance Wildlife Control Professional, The Education Store, Purdue Extension’s resource center
FAQs – How can I get rid of nuisance wildlife (bats, deer, racoons, etc.)?

Division of Fish and Wildlife
Indiana Department of Natural Resources (IN DNR)