Small in size but big in ecological impact, the little brown bat (Myotis lucifugus) is one of the most widespread and studied bat species in North America. From city parks to deep forests, this insect-eating bat helps naturally manage pest populations. While they’re generally harmless to people, their presence in homes and buildings can raise concerns.
Knowing how to identify, understand, and handle interactions with little brown bats can help you make informed decisions and protect both your home and local wildlife.
This bat is well known across the U.S. and Canada. True to its name, it’s small, brown, and most active after sunset. These bats are most often seen swooping through the evening sky in search of flying insects. They rely on echolocation to find prey, even in total darkness.
Unlike some bats that stick to specific climates, the little brown bat is highly adaptable. It can be found in both rural and urban areas, from woodlands and wetlands to city buildings. This versatility has made it one of the most common bats in North America, though it faces growing threats in recent years.
Little brown bats have glossy brown fur, a small, rounded nose, and dark wings. Adults typically weigh less than half an ounce and have a wingspan of 8 to 11 inches. Their ears are short and notched, and their tail is fully enclosed in a membrane that helps them maneuver in flight.
You’re most likely to see one in flight during warmer months, especially around dusk when insects are most active.
This bat species is incredibly versatile, adapting to a range of environments across North America. Where they roost often depends on the season and availability of shelter.
Able to eat half their body weight in insects each night, little brown bats use echolocation to detect and catch flying insects mid-air, snapping up prey in rapid bursts of flight.
During the warmer months, their diet includes mosquitoes, flies, moths, beetles, and midges. They tend to hunt near water, in meadows, and along tree lines where insect activity is highest.
In colder months, little brown bats enter hibernation and stop feeding altogether. They rely on stored fat reserves to survive the winter. This seasonal shift in activity helps them conserve energy when food is scarce.
The little brown bat’s predators include falcons, owls, hawks, snakes, raccoons, and domestic cats. These animals may catch them during flight or raid their roosting sites.
In addition to natural predators, the species faces serious threats from habitat loss and white-nose syndrome (WNS), which is a fungal disease that has devastated bat populations across North America.
Light pollution, pesticides, and disturbance during hibernation can also impact their health and survival. For these reasons, it’s especially important to handle any bat activity in or near your home with care and respect for their protected status.
If you’ve seen signs of activity, our guide to getting rid of bats can help you understand your next steps and when to call in a professional.
If you suspect bats may be roosting in your home, here are a few key signs to look for:
If you find bats roosting in your attic, walls, or roofline, the safest and most responsible solution is to call a professional. Our trained technicians understand how to identify bat species, locate entry points, and create exclusion strategies that let bats exit without harming them. Our expert bat removal services include sealing entry points, cleaning up guano, and preventing future infestations. Because many bat species are protected, any removal must follow local wildlife laws.
Not usually. Little brown bats prefer to avoid people and do not act aggressively. The main concerns come from contact with droppings (guano) or handling a bat, which can lead to health risks if not done properly.
Yes, like any mammal, these bats can carry rabies, but it's rare. Most bats are not rabid. Still, you should never touch a bat with bare hands. If one is found indoors or has contact with a person or pet, seek medical advice.
They are surprisingly quick. Little brown bats can fly at speeds of up to 20 miles per hour, using fast, agile movements to chase down insects in midair.
Call our local experts now {telNumber} ({openingHoursSummary}) or view more details about your nearest branch