The first cold nights of October bring two familiar sounds to Maryland homes: the furnace kicking on, and something scratching overhead. Fall is when raccoons, squirrels, bats and rodents pick their winter dens, and a warm attic or an uncapped chimney is exactly what they are looking for. It is also when many homeowners light the first fire of the season and discover that the flue already has a tenant.
This guide covers which animals move into attics and chimneys in fall, how to tell them apart by sound and sign, why smoking an animal out of a chimney is a mistake, and how to get rid of animals in the attic for good, so they do not simply move back in next year.
Which wildlife moves into attics and chimneys in fall
Raccoons, gray squirrels, bats, mice, and rats are the animals most often found in attics, with opossums and skunks more common in crawlspaces and under decks. In fall, they look for warm, dry places to den for winter, and an attic reached from an overhanging tree, or an uncapped chimney, offers exactly that.
Each of these animals uses the space differently. Raccoons are large, strong and determined; a mother raccoon will den in an attic or chimney and, later, raise her young there. Gray squirrels build leaf nests in attic corners and insulation, and they often move in during fall to store food and stay warm. Bats tuck into narrow gaps near the roofline and can roost in an attic largely unnoticed until droppings build up. Mice and rats are smaller but far more numerous, and they travel through wall voids, so an attic problem is often a whole-house problem.
Opossums and skunks are less likely to climb into an attic, but they readily move into crawlspaces, under porches and beneath decks, especially where there is easy access and a nearby food source like pet food or open trash.
What animal is in my attic? Reading sounds and signs
You can usually identify the animal in an attic by timing and sound. Heavy thumps and dragging at night suggest raccoons, light scratching all night suggests mice or rats, and early-morning activity suggests gray squirrels. Droppings, torn soffits, bent roof vents, and greasy rub marks around openings help confirm it.
A few patterns are worth knowing:
- Raccoons: Heavy, deliberate movement, often after dark, with thumping, walking sounds and sometimes chattering or growling. Look for torn soffits, lifted shingles or bent vent covers.
- Gray squirrels: Quick scurrying and rolling sounds, often at dawn and again in late afternoon. Look for chewed holes around fascia boards and roof edges.
- Mice and rats: Light, rapid scratching that can go on all night, often inside walls as well as overhead. Look for small droppings along rafters and insulation tunnels.
- Bats: Faint squeaking or fluttering near dusk. Look for dark droppings collecting below a gap near the roofline and staining around the opening.
Sound in a chimney deserves its own attention. Raccoons in a chimney flue tend to produce heavier scratching, thumping and chattering, often loudest at dusk and dawn as they come and go. Birds such as chimney swifts make high, fluttering and chirping sounds, and squirrels tend to sound frantic and scrabbling because they often fall in and cannot climb back out. If you are unsure what you are hearing, it is worth having a professional check before you do anything else. Not sure if wildlife has actually moved in? Here is how to tell if wildlife is already inside.
Raccoons in the chimney, and why you must never smoke them out
Raccoons in a chimney announce themselves with scratching, thumping, or chattering inside the flue, often at dusk and dawn, plus a musky smell or debris falling into the firebox. Lighting a fire to drive them out is dangerous and often backfires: animals can be trapped or killed in the flue, nesting material can catch fire, and smoke can back up into the house. Keep the damper closed and leave the animal an open exit at the top.
A raccoon that dies in a flue creates an odor problem and a blockage. A nest of sticks and leaves that catches fire creates a fire hazard. And a frightened animal that comes down instead of up can end up inside your living room. If you suspect a raccoon in the chimney, close the damper, keep children and pets away from the fireplace, and do not use the fireplace until you know the animal is gone and the chimney has been capped.
What happens if there are babies
If an animal in an attic or chimney has young, removal has to account for them, or the mother will try to break back in. Professionals confirm whether young are present, remove them by hand when needed, and give the mother a way to retrieve them before sealing or capping anything.
This is one of the main reasons do-it-yourself wildlife removal goes wrong. Sealing an opening while young are still inside traps them, and a mother raccoon separated from her kits will tear through roofing, soffits or even the inside of a wall to get back to them. The result is more damage, a harder removal and, often, the smell of animals that could not get out.
How animals get in
Animals get into attics through weak points at the roofline: loose or rotted soffits and fascia, unscreened gable and roof vents, gaps where roof sections meet, plumbing vent boots, and uncapped chimneys. Raccoons tear open soft spots, squirrels chew small holes wider, and branches touching the roof give them a route up.
Walk around your home and look up. Check the corners where roof sections meet (often called roof returns), the edges of soffits, every vent cover, and the chimney top. Any gap, sagging panel or chewed edge is a possible entry point. Inside the attic, daylight showing through at the roofline is a strong clue. Trees are part of the picture too: limbs that touch or overhang the roof act as a bridge for squirrels and raccoons.
Where attic wildlife problems are most common
Attic wildlife problems are most common where homes meet woods and streams, such as neighborhoods along Patapsco Valley State Park in Catonsville and Ellicott City. Animals move between the woods and backyards every night, and older homes with wood soffits and mature trees overhead offer the easiest entry.
That pattern holds across the region. In Catonsville and neighboring Halethorpe, established neighborhoods with tall trees, wooded stream valleys and older rooflines give raccoons and squirrels both habitat and access. Homes that back onto parkland, creeks or wooded lots should be checked every fall, before animals settle in for the winter.
Why fall is the time to act
Fall is the best time to deal with attic wildlife because animals are choosing winter dens now, and many species give birth in late winter and spring. Removing and excluding animals before young arrive avoids orphaned babies in the walls, which makes removal harder, slower, and more expensive.
There is a practical reason too. Fall is when you are already thinking about the roof, gutters and chimney before winter. Combining a wildlife inspection with that seasonal maintenance means openings get sealed before cold weather pushes more animals to look for shelter.
How to get rid of animals in the attic for good
Getting rid of animals in an attic for good means exclusion, not just trapping. Confirm the species and entry point, check for young, install a one-way door so the animals leave on their own, then repair and screen every opening. For a chimney, that means a sturdy, mesh-sided cap fitted after every animal is out. Check the cap each fall before the heating season starts.
Trapping alone tends to fail because it removes one animal but leaves the opening, and the next animal finds it quickly. Exclusion closes the door permanently. A typical exclusion job includes:
- Inspecting the full roofline, vents and chimney to find every active and potential entry point
- Confirming whether young are present and handling them safely
- Installing one-way doors or exits so animals leave and cannot return
- Repairing soffits and fascia and screening vents once the animals are out
- Capping the chimney with a sturdy, mesh-sided cap
- Recommending clean-up of contaminated insulation where needed
Raccoons and gray squirrels are common across Maryland, and county guidance points residents to licensed wildlife control for animals in an attic or chimney. Raven Termite & Pest Control provides wildlife removal and exclusion designed to get animals out and keep them out.
Who to call for wildlife in your home
For wildlife in an attic, crawlspace, or chimney, Maryland residents typically hire a licensed private wildlife control professional, while county animal services respond when an animal is loose in the living space or injured.
If you are hearing noises overhead, finding droppings, or noticing damage at the roofline this fall, do not wait for the problem to grow through the winter. Contact Raven Termite & Pest Control to schedule a wildlife inspection, and we will identify what is living in your attic or chimney, how it got in, and what it will take to keep it out.
Frequently Asked Questions
How do you get rid of animals in the attic?
The reliable way is exclusion. Confirm the animal and entry point, make sure no young are inside, and install a one-way door so the animal leaves on its own. Then repair and screen every opening. Securing trash and pet food outside and trimming overhanging branches keeps animals from returning.
What animal is in my attic at night?
Usually raccoons, mice or rats. Raccoons are heavy and slow, with thumping and dragging. Mice and rats make lighter, quick scratching that can last all night. Gray squirrels are the exception, since they are active by day, especially early morning. Timing, droppings, and entry-hole size can narrow it down.
How do animals get in the attic?
Through gaps at the roofline: loose or rotted soffits and fascia, unscreened gable vents, roof returns, plumbing vent boots, and uncapped chimneys. Raccoons can rip open weak spots, while squirrels chew to widen small holes. Branches touching the roof, common on wooded lots, give them an easy route up.
How do you get a raccoon out of a chimney?
Close the fireplace damper, keep people and pets away, and leave the top of the chimney open so the raccoon can climb out on its own at night. Never light a fire or use smoke. If it does not leave, or if young are inside, a licensed wildlife professional can remove the animals and cap the chimney.
How do you keep raccoons out of your chimney?
A properly fitted chimney cap with mesh sides is the most reliable way. Check it every fall, since storms and animals can loosen it. Keep tree limbs trimmed back from the roof, use lidded trash cans, and bring pet food indoors at night. Never cap a chimney with animals still inside; that traps them and creates a worse problem.
Who do you call for animals in the attic?
Call a licensed wildlife control company for animals living in an attic, chimney or crawlspace. Private wildlife control professionals handle eviction and exclusion. County animal services generally respond only when an animal is inside the living space, sick or injured.
