Michigan is home to nine bat species, ranging from the familiar big brown bat to federally endangered species such as the Indiana bat and northern long-eared bat. These mammals occupy forests, trees, caves, mines, wetlands, agricultural landscapes and, in some cases, human structures.
Bats are important insect predators and play a valuable role in Michigan’s ecosystems. However, several species have experienced serious population declines, particularly because of white-nose syndrome, a fungal disease affecting hibernating bats. Michigan’s Department of Natural Resources (DNR) monitors bat populations and roosts while working with conservation partners to protect vulnerable species.
If you’re looking for Michigan bat species pictures, trying to identify a bat near your home, or simply want to understand Michigan wildlife, knowing the differences between species is a useful starting point.
Key Takeaways
- Michigan currently has nine recognized bat species.
- All nine are insect-eating bats that contribute to natural pest control.
- The Indiana bat and northern long-eared bat are federally endangered.
- Michigan also protects several bat species under its state threatened and endangered species rules.
- White-nose syndrome remains one of the most serious threats to cave-hibernating bats.
- Bats can use trees, forests, caves, mines, buildings and other structures as roosting or hibernation sites.
- A bat found inside a building should be handled carefully, and protected species should not be disturbed without appropriate guidance.
How Many Bat Species Live in Michigan?
Michigan is home to nine bat species:
| Bat species | Scientific name | General status in Michigan |
|---|---|---|
| Little brown bat | Myotis lucifugus | State threatened |
| Northern long-eared bat | Myotis septentrionalis | State threatened; federally endangered |
| Indiana bat | Myotis sodalis | State endangered; federally endangered |
| Big brown bat | Eptesicus fuscus | Commonly encountered |
| Silver-haired bat | Lasionycteris noctivagans | Migratory |
| Hoary bat | Lasiurus cinereus | Migratory |
| Eastern red bat | Lasiurus borealis | Migratory |
| Evening bat | Nycticeius humeralis | State threatened |
| Tricolored bat | Perimyotis subflavus | State threatened |
The Michigan DNR’s current bat information page lists all nine species. Michigan’s threatened and endangered species regulations identify the Indiana bat as endangered and the little brown, northern long-eared, evening and tricolored bats as threatened at the state level.
1. Little Brown Bat
The little brown bat is one of the best-known bats associated with Michigan homes, barns and other structures.
It is a small, brown insect-eating bat that uses echolocation to locate prey at night. During warmer months, individuals may use buildings or trees as roosting locations, while suitable underground sites can provide winter hibernation habitat.
The species has been severely affected by white-nose syndrome. Michigan lists the little brown bat as a threatened species, making conservation and responsible management particularly important.
Little Brown Bat Identification
Look for:
- Small body size
- Brown fur
- Rounded appearance
- Rapid nighttime flight
- Frequent association with insect-rich habitats
If you are searching for brown Michigan bat species, the little brown bat is one of the species you may encounter.
2. Big Brown Bat
The big brown bat is larger and more robust than the little brown bat. Its brown fur and relatively broad wings make it one of the easier Michigan bats to recognize.
Big brown bats can adapt to human-dominated environments and may use buildings as roosting sites. They hunt flying insects after sunset and can often be seen around open areas, fields and residential neighborhoods.
Their ability to use both natural and artificial structures helps explain why they are sometimes encountered around homes.
3. Northern Long-Eared Bat
The northern long-eared bat is a small forest-associated species recognizable partly by its relatively long ears.
It commonly uses trees and forest structures for summer roosting. During winter, it depends on suitable hibernation sites.
This species has experienced dramatic declines because of white-nose syndrome. The U.S. Fish and Wildlife Service reclassified the northern long-eared bat as endangered under the Endangered Species Act in 2022.
Michigan also lists it as a state-threatened species.
Because of its protected status, activities that could affect its habitat may require additional consideration or regulatory review.
4. Indiana Bat
The Indiana bat is another important protected species found in Michigan.
This relatively small bat uses trees for summer roosting and caves or mines for winter hibernation. In Michigan, it occurs mainly in the southern Lower Peninsula.
The Indiana bat is federally endangered and is also listed as endangered under Michigan regulations.
White-nose syndrome, habitat changes and other human-related pressures have made conservation of Indiana bat populations a major concern.
If you encounter a suspected Indiana bat or an important bat habitat area, avoid disturbing it and seek guidance from appropriate wildlife authorities.
5. Silver-Haired Bat
The silver-haired bat gets its name from the frosted or silver-tipped appearance of its darker fur.
Unlike some species that frequently use buildings, silver-haired bats are strongly associated with wooded habitats. They can roost beneath loose bark, in tree cavities and other sheltered locations.
They are also migratory. Michigan can provide important habitat during portions of their annual movement.
6. Hoary Bat
The hoary bat is one of Michigan’s larger bats and is known for its distinctive fur, which gives the animal a frosted appearance.
It is generally associated with trees and forested landscapes and is considered one of the migratory tree bats.
Hoary bats can travel considerable distances during migration, and they are among the bat species affected by human activities that increase mortality during migration.
Michigan DNR identifies hoary bats among the state’s nine bat species.
7. Eastern Red Bat
The eastern red bat is particularly recognizable because of its reddish or orange-brown fur.
It is primarily a tree-roosting species. Rather than forming large colonies inside buildings, individuals may hang from branches and foliage, where their coloration can help them blend into their surroundings.
Eastern red bats are migratory and feed on flying insects at night.
Their presence demonstrates that bats in Michigan are not limited to caves or attics. Different species use very different habitats.
8. Evening Bat
The evening bat is another species included in Michigan’s current list of nine bats.
It is associated with forested and developed landscapes and can use buildings and other structures as roosting habitat.
Michigan lists the evening bat as a threatened species.
The species is particularly interesting from a Michigan wildlife perspective because the state sits near the northern edge of its broader range, and researchers continue to learn more about its distribution and ecology in the region.
9. Tricolored Bat
The tricolored bat, formerly known in some sources as the eastern pipistrelle, is one of Michigan’s smallest bats.
Its fur has a distinctive multicolored appearance, while its small size and flight behavior can make identification challenging without experience.
The species has suffered substantial population declines associated with white-nose syndrome. Michigan classifies it as threatened, and the U.S. Fish and Wildlife Service has proposed federal endangered-species listing.
Where Do Bats Live in Michigan?
Bats use different habitats depending on the species and season.
Common bat habitat includes:
- Forests
- Tree cavities
- Loose tree bark
- Caves
- Abandoned mines
- Wetlands
- Agricultural areas
- Bridges
- Barns
- Attics
- Other buildings
Some species are primarily tree roosting bats, while others depend heavily on caves or mines for winter hibernation.
Michigan’s forest habitats can be particularly important because trees provide maternity and summer roosts for several species. The Michigan DNR’s habitat conservation program emphasizes the importance of roost trees and hibernation sites to bat conservation.
How Do Michigan Bats Help the Ecosystem?
Michigan bats are primarily insectivores, meaning they eat insects.
Their nighttime feeding helps regulate insect populations and provides natural pest control. This can benefit ecosystems, forests and agricultural landscapes.
Bats use echolocation to navigate and detect prey. They produce high-frequency sounds and interpret returning echoes to understand their surroundings.
This sophisticated biological system allows bats to hunt in darkness and navigate through complex environments.
What Threatens Michigan Bat Populations?
The biggest conservation concern for several Michigan bat species is white-nose syndrome (WNS).
The disease is caused by a fungus that affects hibernating bats. Infected bats may wake repeatedly during hibernation, consume valuable energy reserves and eventually die when food is unavailable. Michigan DNR identifies white-nose syndrome as a major threat to bats.
Other threats include:
- Habitat loss
- Loss of roost trees
- Disturbance of hibernation sites
- Human activity around caves and mines
- Wind-energy mortality
- Changes to forest habitat
- Other sources of direct mortality
Michigan DNR notes that wind-related fatalities have been documented for multiple state-threatened or endangered bat species, while migratory tree bats such as hoary, eastern red and silver-haired bats are among the species most commonly found in wind-turbine fatalities.
Are Michigan Bats Protected?
Yes. Several Michigan bat species receive state or federal protection.
The Indiana bat and northern long-eared bat are federally endangered. Michigan also lists the Indiana bat as endangered and the northern long-eared, little brown, evening and tricolored bats as threatened.
This is important for homeowners, landowners, developers and forest managers.
Before removing trees, disturbing known roosts or carrying out work that could affect protected bats, check current Michigan DNR and U.S. Fish and Wildlife Service requirements.
Michigan provides specific permitting information for threatened and endangered species, including removal of bats from structures.
What Should You Do If You Find a Bat in Your Home?
If you discover a bat inside your home, stay calm and avoid handling it with bare hands.
1. Keep people and pets away
Move children and pets away from the area and give the bat space.
2. Do not chase the bat
Trying to catch or strike a flying bat can cause unnecessary stress and may increase the chance of contact.
3. Identify where it entered
Look around areas such as:
- Attic vents
- Roof gaps
- Chimneys
- Soffits
- Eaves
- Wall openings
4. Do not immediately seal an active entry point
If bats are still using the structure, sealing an opening can trap animals inside.
5. Get appropriate professional guidance
Michigan DNR provides information concerning bat removal from structures and permitting requirements.
A qualified wildlife professional can determine whether exclusion is appropriate and how to perform it without unnecessarily harming bats.
Can You Put Up a Bat House in Michigan?
Yes, bat houses can provide additional roosting opportunities, but simply installing one does not guarantee that bats will move in.
Location matters.
Michigan DNR recommends learning about appropriate bat-house placement and notes that bat houses should not be located where they are frequently accessed by people or domestic animals.
A suitable bat house should be considered part of a broader habitat strategy rather than a guaranteed solution for an attic or building infestation.
How Can You Help Michigan Bats?
You can support bat conservation in several practical ways:
- Protect mature trees where appropriate.
- Avoid disturbing known hibernation sites.
- Learn how to identify local bat species.
- Keep cats and pets away from vulnerable wildlife.
- Support responsible bat-house placement.
- Report important bat roosts through appropriate Michigan programs.
- Follow wildlife regulations when dealing with protected species.
- Avoid unnecessary disturbance of bats during sensitive periods.
Michigan’s Bat Roost Monitoring Program is a partnership involving the Michigan Natural Features Inventory and Michigan DNR. The program uses reports from community scientists to improve understanding of where bats roost throughout the state.
Michigan Bat Roost Monitoring
Monitoring bat roosts helps researchers understand how bats use Michigan’s landscape.
The Michigan Bat Roost Monitoring Program collects information about roost locations on private and public land. This information can contribute to statewide conservation planning.
For landowners, this creates an opportunity to contribute useful information without becoming a professional wildlife researcher.
Michigan Bat Species Pictures: What Should You Look For?
If you’re trying to identify a bat from a photograph, focus on several features rather than color alone.
Look at:
- Ear length and shape
- Fur color
- Body size
- Wing shape
- Tail and membrane structure
- Roosting behavior
- Location where the bat was found
- Season of observation
Color can be misleading because lighting, age and individual variation can change how a bat appears.
For protected species, visual identification should not be treated as definitive. Professional surveys may use acoustic monitoring, field measurements and other specialized identification methods.
In 2026, the U.S. Fish and Wildlife Service issued updated range-wide Indiana bat and northern long-eared bat survey guidelines, including updated approaches to acoustic surveys and DNA collection.
Michigan DNR Bat Resources
The Michigan Department of Natural Resources is one of the most useful official resources for information about Michigan bats.
Its resources cover:
- Michigan bat species
- Threatened and endangered species
- Bat roost monitoring
- Bat habitat conservation
- White-nose syndrome
- Bat-human interactions
- Bat removal from structures
- Bat houses
- Wildlife permits
The DNR also works with the U.S. Fish and Wildlife Service and other conservation partners on bat habitat and species protection.
Frequently Asked Questions
What are the Michigan bat species pictures I should look for?
Michigan’s nine bat species are the little brown bat, northern long-eared bat, evening bat, hoary bat, big brown bat, tricolored bat, Indiana bat, silver-haired bat and eastern red bat. Their appearance varies considerably in size, fur color, ear shape and wing structure.
What are the brown Michigan bat species?
The little brown bat and big brown bat are two well-known brown bats found in Michigan. The northern long-eared bat and Indiana bat can also appear brownish or grayish-brown, so color alone is not enough for reliable identification.
What is a little brown bat?
The little brown bat (Myotis lucifugus) is a small insect-eating bat found in Michigan. It can use buildings and natural structures for roosting and is affected by white-nose syndrome. Michigan lists it as a threatened species.
What is a hoary bat?
The hoary bat (Lasiurus cinereus) is a relatively large, migratory tree-roosting bat recognized by its distinctive frosted-looking fur. It is one of the nine bat species currently recognized in Michigan.
What does the Michigan DNR say about bats?
The Michigan DNR recognizes nine bat species in the state and provides information about their habitats, conservation status, threats, bat roost monitoring and interactions with people. The agency identifies white-nose syndrome as an important threat and provides resources for bat conservation and removal from structures.
What is a northern long-eared bat?
The northern long-eared bat (Myotis septentrionalis) is a forest-associated species with notably long ears. It is federally endangered because of severe population declines associated primarily with white-nose syndrome.
What is a big brown bat?
The big brown bat (Eptesicus fuscus) is a relatively large brown bat that can use buildings and other structures for roosting. It is an insect-eating species and is one of Michigan’s nine bat species.
Are vampire bats found in Michigan?
No. Vampire bats are not native to Michigan. The bats found in Michigan are primarily insect-eating species, and Michigan’s current list contains nine native or regularly occurring bat species.
Final Thoughts
Michigan’s bats are more diverse than they may first appear. From the little brown bat and big brown bat around buildings to migratory tree bats such as the hoary, eastern red and silver-haired bats, each species occupies a different ecological niche.
The state’s protected species, including the Indiana bat and northern long-eared bat, also demonstrate why responsible wildlife management matters.
White-nose syndrome continues to challenge several cave-hibernating species, while habitat loss and other human activities add further pressure. Protecting roosts, avoiding unnecessary disturbance and following Michigan wildlife regulations can help preserve these important mammals.
If you find a bat in a home or other building, treat it as wildlife rather than a pest to handle yourself. Appropriate identification and professional guidance are especially important when protected species may be involved.
Author Bio: Hamid Ali is a wildlife and environmental content writer focused on U.S. wildlife, conservation, and nature topics. He creates research-driven, easy-to-understand content that helps readers better understand species, habitats, and responsible wildlife practices.
Author Name: Hamid Ali
Email: johanharwen314@gmail.com
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