Bats in Wisconsin

The state of Wisconsin has only 8 native species of bats. The largest of these is the Hoary Bat, which has a wingspan between 13 inches and 16 inches, while the Tricolored Bat is the smallest and has a wingspan between 7 and 9 inches.

Different Types of Bats in Wisconsin

Vesper Bats (Vespertilionidae)

Big Brown Bat
Eastern Red Bat
Hoary Bat
Indiana Bat
Keen’s Myotis
Little Brown Bat
Silver-haired Bat
Tricolored Bat

Places To Go Bat Watching in Wisconsin

Yellowstone Lake State Park is an amazing place to see the Little Brown Bats in the summer, with more than 4000 recorded in the park. Devil’s Lake State Park is also great for seeing bats emerging at dusk without disturbing them.

FAQ

1. Do bats migrate or hibernate in Wisconsin?

Some of the bats in Wisconsin will migrate to a different state down south during winter as their primary food source – insects – becomes scarce when it gets colder. Bats known to do this are generally tree living species like the Hoary Bat, the Eastern Red Bat, and the Silver-haired Bat.
The other bats prefer dwelling in caves and will hibernate during the harsher months. These locations, referred to as “hibernacula,” generally include caves, crevices within rocky structures, and abandoned buildings.

2. Are bats protected in Wisconsin?

Yes, all species of bats found in Wisconsin are protected. This is because, within the state, the Big Brown Bat, the Little Brown Bat, and the Tricolored Bat are all threatened, and the rest are at risk.