There is no single "magic" spray or chemical that permanently repels bats. The most effective approach is a combination of physical exclusion (sealing entry points) to force them out, ultrasonic sound devices, and habitat modification.
The most effective way to repel bats is exclusion. While deterrents like bright lights or strong scents can make an area uncomfortable, sealing entry points with caulk, mesh, or bat valves is the only permanent, legal way to keep bats out of your home.
Bats are typically removed using humane exclusion methods that allow them to leave but not return. This involves identifying entry points, installing one-way devices, and sealing up gaps once the bats are gone. Cleanup may also be needed if droppings are present.
Bats strongly dislike intense, pungent odors, with peppermint and eucalyptus being the scents they hate the most. They are also highly repelled by other strong fragrances such as cinnamon, cloves, and mothballs.
No, ultrasonic bat repellers do not work. Wildlife control experts, the Federal Trade Commission (FTC), and state wildlife agencies (like the Minnesota DNR) consider these devices entirely ineffective. Bats are highly adaptable and quickly ignore the high-frequency sounds or simply move to a different part of the attic where the sound doesn't reach.
Bats are most disturbed by ultrasonic sounds (frequencies above 20 kHz) and loud, erratic human noises. These frequencies interfere with their echolocation and simulate the presence of predators, making their roosting environments uncomfortable.
Yes, most bats are highly loyal to their roosts and will return to the exact same location every morning after hunting. Because they require safe, familiar, and dark shelters, they rely on strong "homing" instincts to return to the same cave, tree cavity, or attic day after day.
Can dryer sheets repel bats? While dryer sheets have a strong smell that bats might find unpleasant, Christner says they're not a reliable method for bat control. “They may offer minimal deterrence and should not be relied upon as a long-term solution,” he says.
For bats, this can only be done when pups are volant (flying). Exclusion should never be done during hibernation which is generally mid-October through early April (there is also no animal waste being produced during this time).
Lights: Since bats are nocturnal creatures, they shy away from bright environments and dislike lights. To encourage them to leave potential nesting areas, consider installing lights and keeping them on continuously for 24 hours.
Yes, bright artificial light can temporarily discourage bats and make them uncomfortable, as they are nocturnal and prefer dark spaces. However, light alone is rarely a permanent or effective deterrent. Bats are highly adaptable; they may simply relocate to a darker corner of your attic or crawlspace to avoid the light.
WNS is the number one threat to bats, killing more than a million bats each year and causing mortality rates that approach 100% at some sites.
Once bats set up shop in the attic, they can stay for a long time if you don't know their way of life. Mostly, female bats and their pups are ready to leave the attic to hibernate in the nearby caves right before winter.
How can I get rid of bats in my attic or house naturally?
“Bats hate strong scents, bright lights, and high-frequency sounds that disrupt their environment.”
Bat repellent sprays generally rely on strong, natural scents like peppermint, spearmint, or cinnamon essential oils, which bats find highly offensive. They are best used to deter bats from confined spaces like attics, chimneys, and sheds, or to encourage them to leave.
Bat require specific temperatures for hibernation ranging from 35-40 degrees Fahrenheit. Big Brown bats have figured out that attics can provide the perfect temperature for survival and have adapted to hibernating in attics rather than caves. If the hibernacula temperature is too warm, then they expend too much energy.
Yes, bats can hear human voices. While their famous echolocation uses ultra-high frequencies that are beyond human perception, bat hearing covers a broad range. Their hearing stretches from as low as 700 Hz to over 200,000 Hz.
Bat Prevention
Using sealants to close cracks, gaps or holes used by bats and use of an exclusion device called a one-way door that enables a bat to exit but not reenter a roosting site. Use of sealants only often causes bats that are not outside the roosting site to be trapped inside and die.
Bats have a highly developed sense of smell and are sensitive to strong, sharp odors. They naturally dislike and are deterred by the smells of peppermint, eucalyptus, cinnamon, clove, and citrus. They are also put off by harsh chemical odors like ammonia and naphthalene (the active ingredient in mothballs).
No, it is not recommended to sleep in the same space as a bat. It's unsafe and could put you at risk. Bats can carry serious diseases like rabies, and since they often move silently and swiftly, you may not even realize you've been exposed. If there's a bat in your home, you have every reason to take it seriously.
Putting a dryer sheet in your mailbox is a clever trick used by mail carriers to repel stinging insects like wasps, hornets, and yellowjackets. These pests love to build nests inside the dark, sheltered confines of mailboxes. The strong aroma of scented dryer sheets deters them without harming them.
Yes, bright artificial light can temporarily discourage bats and make them uncomfortable, as they are nocturnal and prefer dark spaces. However, light alone is rarely a permanent or effective deterrent. Bats are highly adaptable; they may simply relocate to a darker corner of your attic or crawlspace to avoid the light.
Bats use hibernation to reduce their energy consumption during difficult, colder periods, when insect prey is limited. Generally, British bats will enter hibernation around early October; emerging anytime from March to late April and into May.
Collisions with wind turbines and white-nose syndrome are now the leading causes of reported MMEs in bats. Collectively, over half of all reported MMEs were of anthropogenic origin.