A bat loose in your house is almost certainly clinging to something, staying still and quiet until dark. Finding it means checking the right spots, looking for physical evidence, and then isolating the room so you can either let it leave on its own or safely capture it. Most single-bat encounters resolve in under an hour once you know what to do.
Where Bats Hide During the Day
Bats don’t sit on open surfaces. They hang, wedge, and tuck themselves into tight, dark spaces that mimic the crevices they use outdoors. If a bat got into your living space and you lost track of it, start with these spots:
- Curtains and drapes. A bat will cling to the folds of fabric, especially floor-length curtains near windows. Check behind them and between the layers.
- Behind wall hangings and mirrors. The narrow gap between a picture frame and the wall is exactly the kind of crevice bats seek out.
- On top of high shelves and cabinets. Bats often settle in upper corners of rooms where air is warmest and activity is lowest.
- Inside open closets. Hanging clothes provide vertical surfaces to cling to, and closets are dark and undisturbed.
- Between window frames and screens. If a window was open, a bat may have wedged itself into the gap between the glass and the screen.
- Houseplants. Large indoor plants with dense foliage can conceal a resting bat.
- Attic spaces and wall recesses. If the bat came from inside the building structure rather than through an open door, it likely entered through a gap connecting the attic or walls to the living space.
Work your way through each room slowly with a flashlight. Bats are small, often no bigger than a human thumb when folded up, and their brown coloring blends easily into wood, fabric, and shadow. Check high first, then low. Look along ceiling edges, crown molding, and the tops of door frames.
Physical Evidence That a Bat Is Present
If you can’t spot the bat visually, look for droppings. Bat guano is small, dark, and segmented, similar in size to mouse droppings but with key differences. When you crush bat droppings, they crumble into powder and reveal shiny flecks of undigested insect parts. Mouse droppings, by contrast, are harder, more fibrous, taper at the ends, and don’t become powdery when crushed. Bat droppings also never contain the white chalky residue you’d see from birds or reptiles.
Check attic floors, the base of walls, windowsills, and any surface directly below a potential roosting spot. Guano accumulates beneath wherever a bat is hanging. Urine staining and a musty, ammonia-like smell are additional signs, particularly near larger or longer-term roosts. Rub marks, dark greasy streaks left by the oils in bat fur, sometimes appear around entry points like gaps in trim, vents, or pipe openings where a bat repeatedly squeezes through.
How to Isolate and Contain the Bat
Once you find the bat, or even narrow it down to a single room, your first move is containment. Remove children and pets from the area immediately, especially cats, which will try to attack the bat and risk being bitten. Close all interior doors connecting the room to the rest of the house. Stuff towels under the doors to block the gap at the bottom. This keeps the bat from relocating to another room while you deal with it.
Avoid sudden movements and loud noises. A calm, quiet room encourages the bat to settle and stay still, making it far easier to locate and remove.
Letting the Bat Leave on Its Own
The simplest approach is giving the bat an exit. Open any windows and exterior doors in the room, then dim or turn off the lights. Bright light disorients bats, so darkness actually helps them navigate. A flying bat will typically circle the room several times until it detects the open window through airflow and echolocation, then fly out. At nighttime, this often takes just a few minutes.
Stand quietly against a wall and wait. Resist the urge to wave your arms, shout, or try to herd the bat toward the opening. Bats don’t respond to that the way you’d expect, and you’ll only keep it agitated and circling longer.
How to Capture a Resting Bat
If the bat has landed on a wall, ceiling, or piece of furniture and won’t leave, you can capture it with items you already have at home. You’ll need leather work gloves (not fabric gardening gloves), a mask, a wide plastic container or bucket, and a piece of stiff cardboard or thin cutting board.
Put on the gloves and mask before you approach. Slowly place the container over the bat, trapping it flat against the surface. Then slide the cardboard between the container’s rim and the wall to seal the opening. Hold the cardboard firmly against the container so there’s no gap, and carry the whole thing outside. Set it on an elevated surface like a porch railing or the top of a fence, remove the cardboard, and step back. The bat may need a minute to orient itself before it drops from the edge and flies away. Never handle a bat with bare hands, even if it appears dead or unresponsive.
One Bat vs. a Colony
A single bat in your living space is usually an accidental visitor, a young bat that got lost, or one that slipped through an open door or window. This is common in summer and typically a one-time event.
Multiple bats, or the same problem recurring over days or weeks, signals a colony living somewhere in the building’s structure. Bats roost in attics, behind siding, inside soffits, and in wall cavities, and they enter living spaces through surprisingly small gaps around pipes, vents, and unfinished trim. If you’re finding droppings in your attic, seeing bats more than once, or noticing them emerging from your roofline at dusk, you’re dealing with a roost rather than a stray.
Colony situations call for professional wildlife control. Six bat species are federally protected, and many states have additional regulations about how and when bats can be removed. Exclusion work (sealing entry points with one-way valves so bats can leave but not return) has to be timed correctly. If flightless pups are present in the roost, typically from late May through mid-August, exclusion will trap them inside to die, which is both inhumane and illegal in many jurisdictions. Guano cleanup in an enclosed attic also requires a respirator, since dried droppings can harbor fungal spores that cause a lung infection called histoplasmosis.
Rabies Risk After Finding a Bat Indoors
For a healthy adult who finds a bat indoors with no known physical contact, the rabies risk is very low. The situation changes if you wake up to find a bat in a bedroom where someone was sleeping, or if a bat was in a room with a young child, someone who was intoxicated, or anyone who might not have noticed a bite. Bat teeth are tiny, and bites can go undetected.
If there’s any possibility of a bite or scratch, try to contain the bat (using the container method above) so it can be tested for rabies rather than released. Contact your local health department or animal control for guidance on submitting the bat for testing. Bites to the head or neck from any wild animal are treated as the highest priority for post-exposure treatment.