9 Types of Bats in Missouri
Yes, Missouri is home to at least 13 bat species, from the common big brown bat and little brown bat to the endangered Indiana bat and rare gray bat. These bats range from just over 3 inches to nearly 5 inches in body length, and they fill different ecological niches across the state. Start your search near water sources and forest edges at dusk during warmer months from May through September. This guide covers the major species you're most likely to encounter, how to tell them apart by size and ear shape, where bats congregate in Missouri, seasonal timing for sightings, and field marks that help you identify them with confidence.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 27, 2026.
Verified species, source iNaturalist
9 types of bats recorded in Missouri
9 bat species have a verified observation record in Missouri across bats (order Chiroptera), each with at least 10 confirmed sightings. The full list, ranked by how often each is recorded, is below.
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Plus 3 more recorded only rarely (fewer than 10 verified sightings). Counts from verified iNaturalist observations. Photos by iNaturalist observers, reused under the licence each observer chose.
Yes, Missouri is home to at least 13 bat species, from the common big brown bat and little brown bat to the endangered Indiana bat and rare gray bat. These bats range from just over 3 inches to nearly 5 inches in body length, and they fill different ecological niches across the state. Start your search near water sources and forest edges at dusk during warmer months from May through September. This guide covers the major species you're most likely to encounter, how to tell them apart by size and ear shape, where bats congregate in Missouri, seasonal timing for sightings, and field marks that help you identify them with confidence.
What types of bats are found in Missouri?
Missouri hosts at least 13 species of bats, though populations and presence vary by season and region. The most widespread and reliable to see are the big brown bat, little brown bat, and Eastern red bat. Big brown bats often roost in barns, caves, and under bridges across the entire state. Little brown bats are abundant in summer but migrate to hibernation sites in caves and mines. Eastern red bats are solitary and roost in trees and shrubs, particularly common in wooded regions. More specialized species include the pipistrelle, myotis species (Keen's bat, Northern long-eared bat), and the pallid bat. Rarer species present in Missouri but harder to locate include the gray bat, which prefers large caves, and the federally endangered Indiana bat. The evening bat and Townsend's big-eared bat also occur in Missouri but are less commonly observed. For a comprehensive species list with detailed ranges, visit ouranimals page for bats. Each species has preferred habitat and seasonal patterns, so understanding which species favor which regions dramatically improves your odds of a successful sighting.
How can I identify the most common Missouri bats?
Start with three key field marks: size, ear shape, and fur color. Big brown bats are 4 to 5 inches long with a wingspan up to 13 inches. Their ears are short and rounded, and their fur is dark brown to nearly black. The nose is blunt and relatively large. Little brown bats are smaller, only 3 to 4 inches long, with glossy fur that ranges from golden to dark brown. Their ears are smaller and more tapered than big brown bats, and the tragus (the inner ear projection) is long and slender. Eastern red bats have a distinctive rusty red or brick-red color and often show white shoulder patches and white flecks throughout their fur. Their ears are small and hairy. Pipistrelles are tiny, just 3 to 3.5 inches, and often have yellowish fur. Myotis species (little brown bats included) have longer, more complex ear shapes with a distinct tragus. The gray bat is uniformly gray above and below with no white patches. Indiana bats are small and black with a pink or reddish lower lip. Beginners often confuse little brown bats with Indiana bats, so pay careful attention to size and the lower lip color if you can observe that detail. Use a field guide with side-by-side comparisons to sharpen your eye, especially for similar species.
Where in Missouri are bats most often seen?
Bats appear statewide, but your odds improve dramatically near water such as rivers, lakes, ponds, and wetlands. The Ozarks region, particularly around Mark Twain National Forest, the Current River, and Shannon County, holds large and stable populations year-round. Mammoth Cave National Park just across the border in Kentucky also influences Missouri cave populations during winter hibernation. Urban and suburban areas host bats under bridges, in old buildings, church steeples, and attics. The Mississippi River corridor supports many bats, especially during migration periods. Don't overlook smaller towns with old barns and covered structures. Wooded edges, particularly mixed forest with water access nearby, are consistently productive. For specific locations to visit and access information, check theMissouri wildlife huband then drill down to thestate animal guidefor the next step in planning your outing.
When is the best time to spot bats in Missouri?
The prime season is May through September when insect activity peaks and bats are most active and vocal. Peak activity occurs from late May through August. Bats emerge around dusk, typically 15 to 30 minutes after sunset, and feed until late evening or into the night depending on weather. Warm evenings, especially those following warm days, produce more active foraging, and you'll see bats hunting over fields, water, and along forest edges. Late summer (July and August) is ideal because juveniles are learning to fly and food is abundant. Spring migration (April and May) brings species moving north. Fall migration (August and September) can be spectacular as bats fuel up before hibernation. Winter is poor for sightings because most bats hibernate in caves or mines from October through March. Some big brown bats may emerge during winter warm spells, but this is unpredictable. Night temperature also matters: bats fly more actively when it's above 50 degrees Fahrenheit. Plan your outings for warm evenings during the May to September window for the best results.
What are the key field marks for bat identification in Missouri?
Pay close attention to five visible features when you spot a bat. First is the tragus, the small projection inside the ear canal. Big brown bats have a short tragus, while little brown bats have a long, tapered tragus. Gray bats have a tiny or absent tragus. Indiana bats have a small tragus and a pinkish lower lip. Second is overall ear shape: some species have folded ears, others have ears that stand straight up. Third is fur color and texture. Red bats are unmistakable with their rusty color and white patches. Pipistrelles are smaller and often yellowish. Gray bats are uniformly gray with no reddish or white tones. Fourth is body size. A 5-inch bat is likely a big brown bat. A 3-inch bat is likely a pipistrelle, little brown bat, or Indiana bat. Fifth is the wing shape and flight pattern. Fast, direct flight often indicates big brown bat or red bat. Fluttering, erratic flight might indicate a myotis species or small bat. The wingspan and proportions of wings to body also help. Use a field guide for accurate comparisons. Thebat species pageprovides detailed illustrations and measurements. Practice makes identification easier, especially as you learn the local species and their habits.
Are there any lookalike species I should be aware of?
Yes, particularly the little brown bat and the Indiana bat. These two species are frequently confused because they overlap in size and roost preferences. The Indiana bat is smaller overall and has a keeled calcar, which is a ridge or keel on the tail membrane that runs along its edge. The little brown bat's calcar is straighter and lacks this keel. The Indiana bat's lower lip is pinkish, while the little brown bat's is dark. The gray bat resembles the big brown bat but is smaller and has a unicolored gray belly. The gray bat also roosts only in caves, never in buildings, which helps distinguish it. The Northern long-eared bat and Keen's bat are rare but can be mistaken for little brown bats if you don't look closely at ear and tragus length. The pallid bat is rarer and has much larger ears, so it's easier to identify once you know what to look for. Always handle bats with care or avoid handling altogether. Many Missouri bat species are protected, and direct contact risks exposure to rabies. If you find a bat on the ground or in an unusual location, contact local wildlife authorities or a rehabilitator rather than touching it.
How do bats use sound to hunt, and can you hear it?
Bats are sophisticated acoustic hunters that emit ultrasonic calls and listen to echoes to navigate and find insects in complete darkness. This ability is called echolocation. Most Missouri bats produce calls between 10 and 100 kilohertz, which is well above the range of human hearing. However, many enthusiasts use bat detectors, which convert ultrasonic calls into audible frequencies, allowing you to hear the echolocation patterns. Each species produces a distinctive call pattern, making acoustic identification possible for trained listeners. Big brown bats produce loud, frequency-modulated calls from about 50 down to 25 kilohertz. Little brown bats produce rapid, repetitive calls. Red bats have a faster pulse rate and a different frequency profile. Some species are chattier than others, and call intensity increases as a bat closes in on prey. Weather affects echolocation success. Bats hunt less in very cold, dry, or foggy conditions when insects are scarce or when echoes bounce unpredictably. By learning to recognize the acoustic signature of common Missouri bats, you add another identification tool beyond visual observation. Online resources and bat monitoring groups offer recordings and guidance for using bat detectors to enhance your appreciation and survey work.
What is the conservation status of Missouri bats, and how are they protected?
Many Missouri bat species are protected under state and federal laws due to habitat loss, disease, and pesticide impacts. The Indiana bat is listed as federally endangered and is actively monitored and protected. The Northern long-eared bat is federally threatened and faces population declines from white-nose syndrome, a fungal disease affecting hibernating bats. The gray bat was once endangered but has recovered significantly thanks to cave protection and now has stable populations in Missouri caves. The little brown bat population has declined sharply in the past 15 years because of white-nose syndrome, which affects hibernating bats in caves and mines during winter. Big brown bats are more resistant to white-nose syndrome and remain relatively stable. Missouri law prohibits harassing, injuring, or killing bats, and disturbing a bat roost is illegal. Several cave systems in the state are protected to preserve hibernation sites. Local and state wildlife agencies work with conservation groups to monitor populations and manage habitat. If you encounter an injured or grounded bat, contacting a wildlife rehabilitator is the appropriate step. Supporting habitat preservation, particularly of caves and mature forests, helps ensure these species thrive. Learning to identify bats and reporting sightings to citizen science projects also contributes to conservation efforts.
Show your bat pride with Missouri bat gear
If you appreciate bats, you can find fun accessories and clothing at Easy Street Markets. Here are a few options:
Cute Bat Sticker
A weather resistant vinyl sticker that shows off your bat appreciation. Great for laptops, water bottles, and car windows.Check Price and Availability
Bat Animal Short-Sleeve T-Shirt
A comfortable tee featuring a bat silhouette. Perfect for casual outings or as a gift.Check Price and Availability
Baby Bat Cartoon T-Shirt
You can't go wrong with this cute cartoon baby bat tee. Soft fabric and a fun design.Check Price and Availability
For more bat themed shirts, browse ourt-shirt collection.
Frequently asked questions about Missouri bats
**Are bats protected in Missouri?** Yes, many species are protected under state and federal laws. The Indiana bat is federally endangered. Avoid disturbing roosts.
**Do bats hibernate in Missouri?** Most species hibernate in caves or mines from October through March. Some, like the big brown bat, may use buildings.
**What should I do if I find a bat in my home?** Open windows and doors to allow it to leave. If it seems sick or cannot fly, contact a wildlife rehabilitator. Do not touch with bare hands.
**Can I attract bats to my yard?** Installing a bat house can provide roosting space. Place it 10-15 feet high in a sunny spot near water.
See ourtour planning ideasfor the next step.
Gear and field guides
Frequently asked questions
What types of bats are found in Missouri?+
Missouri hosts at least 13 species of bats, though populations and presence vary by season and region. The most widespread and reliable to see are the big brown bat, little brown bat, and Eastern red bat. Big brown bats often roost in barns, caves, and under bridges across the entire state. Little brown bats are abundant in summer but migrate to hibernation sites in caves and mines. Eastern red bats are solitary and roost in trees and shrubs, particularly common in wooded regions. More specialized species include the pipistrelle, myotis species (Keen's bat, Northern long-eared bat), and the pallid bat. Rarer species present in Missouri but harder to locate include the gray bat, which prefers large caves, and the federally endangered Indiana bat. The evening bat and Townsend's big-eared bat also occur in Missouri but are less commonly observed. For a comprehensive species list with detailed ranges, visit ouranimals page for bats. Each species has preferred habitat and seasonal patterns, so understanding which species favor which regions dramatically improves your odds of a successful sighting.
How can I identify the most common Missouri bats?+
Start with three key field marks: size, ear shape, and fur color. Big brown bats are 4 to 5 inches long with a wingspan up to 13 inches. Their ears are short and rounded, and their fur is dark brown to nearly black. The nose is blunt and relatively large. Little brown bats are smaller, only 3 to 4 inches long, with glossy fur that ranges from golden to dark brown. Their ears are smaller and more tapered than big brown bats, and the tragus (the inner ear projection) is long and slender. Eastern red bats have a distinctive rusty red or brick-red color and often show white shoulder patches and white flecks throughout their fur. Their ears are small and hairy. Pipistrelles are tiny, just 3 to 3.5 inches, and often have yellowish fur. Myotis species (little brown bats included) have longer, more complex ear shapes with a distinct tragus. The gray bat is uniformly gray above and below with no white patches. Indiana bats are small and black with a pink or reddish lower lip. Beginners often confuse little brown bats with Indiana bats, so pay careful attention to size and the lower lip color if you can observe that detail. Use a field guide with side-by-side comparisons to sharpen your eye, especially for similar species.
Where in Missouri are bats most often seen?+
Bats appear statewide, but your odds improve dramatically near water such as rivers, lakes, ponds, and wetlands. The Ozarks region, particularly around Mark Twain National Forest, the Current River, and Shannon County, holds large and stable populations year-round. Mammoth Cave National Park just across the border in Kentucky also influences Missouri cave populations during winter hibernation. Urban and suburban areas host bats under bridges, in old buildings, church steeples, and attics. The Mississippi River corridor supports many bats, especially during migration periods. Don't overlook smaller towns with old barns and covered structures. Wooded edges, particularly mixed forest with water access nearby, are consistently productive. For specific locations to visit and access information, check theMissouri wildlife huband then drill down to thestate animal guidefor the next step in planning your outing.
When is the best time to spot bats in Missouri?+
The prime season is May through September when insect activity peaks and bats are most active and vocal. Peak activity occurs from late May through August. Bats emerge around dusk, typically 15 to 30 minutes after sunset, and feed until late evening or into the night depending on weather. Warm evenings, especially those following warm days, produce more active foraging, and you'll see bats hunting over fields, water, and along forest edges. Late summer (July and August) is ideal because juveniles are learning to fly and food is abundant. Spring migration (April and May) brings species moving north. Fall migration (August and September) can be spectacular as bats fuel up before hibernation. Winter is poor for sightings because most bats hibernate in caves or mines from October through March. Some big brown bats may emerge during winter warm spells, but this is unpredictable. Night temperature also matters: bats fly more actively when it's above 50 degrees Fahrenheit. Plan your outings for warm evenings during the May to September window for the best results.
What are the key field marks for bat identification in Missouri?+
Pay close attention to five visible features when you spot a bat. First is the tragus, the small projection inside the ear canal. Big brown bats have a short tragus, while little brown bats have a long, tapered tragus. Gray bats have a tiny or absent tragus. Indiana bats have a small tragus and a pinkish lower lip. Second is overall ear shape: some species have folded ears, others have ears that stand straight up. Third is fur color and texture. Red bats are unmistakable with their rusty color and white patches. Pipistrelles are smaller and often yellowish. Gray bats are uniformly gray with no reddish or white tones. Fourth is body size. A 5-inch bat is likely a big brown bat. A 3-inch bat is likely a pipistrelle, little brown bat, or Indiana bat. Fifth is the wing shape and flight pattern. Fast, direct flight often indicates big brown bat or red bat. Fluttering, erratic flight might indicate a myotis species or small bat. The wingspan and proportions of wings to body also help. Use a field guide for accurate comparisons. Thebat species pageprovides detailed illustrations and measurements. Practice makes identification easier, especially as you learn the local species and their habits.
Are there any lookalike species I should be aware of?+
Yes, particularly the little brown bat and the Indiana bat. These two species are frequently confused because they overlap in size and roost preferences. The Indiana bat is smaller overall and has a keeled calcar, which is a ridge or keel on the tail membrane that runs along its edge. The little brown bat's calcar is straighter and lacks this keel. The Indiana bat's lower lip is pinkish, while the little brown bat's is dark. The gray bat resembles the big brown bat but is smaller and has a unicolored gray belly. The gray bat also roosts only in caves, never in buildings, which helps distinguish it. The Northern long-eared bat and Keen's bat are rare but can be mistaken for little brown bats if you don't look closely at ear and tragus length. The pallid bat is rarer and has much larger ears, so it's easier to identify once you know what to look for. Always handle bats with care or avoid handling altogether. Many Missouri bat species are protected, and direct contact risks exposure to rabies. If you find a bat on the ground or in an unusual location, contact local wildlife authorities or a rehabilitator rather than touching it.
How do bats use sound to hunt, and can you hear it?+
Bats are sophisticated acoustic hunters that emit ultrasonic calls and listen to echoes to navigate and find insects in complete darkness. This ability is called echolocation. Most Missouri bats produce calls between 10 and 100 kilohertz, which is well above the range of human hearing. However, many enthusiasts use bat detectors, which convert ultrasonic calls into audible frequencies, allowing you to hear the echolocation patterns. Each species produces a distinctive call pattern, making acoustic identification possible for trained listeners. Big brown bats produce loud, frequency-modulated calls from about 50 down to 25 kilohertz. Little brown bats produce rapid, repetitive calls. Red bats have a faster pulse rate and a different frequency profile. Some species are chattier than others, and call intensity increases as a bat closes in on prey. Weather affects echolocation success. Bats hunt less in very cold, dry, or foggy conditions when insects are scarce or when echoes bounce unpredictably. By learning to recognize the acoustic signature of common Missouri bats, you add another identification tool beyond visual observation. Online resources and bat monitoring groups offer recordings and guidance for using bat detectors to enhance your appreciation and survey work.
What is the conservation status of Missouri bats, and how are they protected?+
Many Missouri bat species are protected under state and federal laws due to habitat loss, disease, and pesticide impacts. The Indiana bat is listed as federally endangered and is actively monitored and protected. The Northern long-eared bat is federally threatened and faces population declines from white-nose syndrome, a fungal disease affecting hibernating bats. The gray bat was once endangered but has recovered significantly thanks to cave protection and now has stable populations in Missouri caves. The little brown bat population has declined sharply in the past 15 years because of white-nose syndrome, which affects hibernating bats in caves and mines during winter. Big brown bats are more resistant to white-nose syndrome and remain relatively stable. Missouri law prohibits harassing, injuring, or killing bats, and disturbing a bat roost is illegal. Several cave systems in the state are protected to preserve hibernation sites. Local and state wildlife agencies work with conservation groups to monitor populations and manage habitat. If you encounter an injured or grounded bat, contacting a wildlife rehabilitator is the appropriate step. Supporting habitat preservation, particularly of caves and mature forests, helps ensure these species thrive. Learning to identify bats and reporting sightings to citizen science projects also contributes to conservation efforts.
Keep exploring
More places to see bat
More wildlife in Missouri