Animal in the Attic? Identify It by Sound & Droppings
You can narrow down the species to one or two candidates without ever climbing into the attic — just by reading the sounds, the droppings and the damage. Here's the field guide Chattanooga pros use on the phone.
Step 1: When Do You Hear It?
- Night only, heavy — like a person walking: raccoon. The heaviest common attic animal; slow, deliberate thumps. Peak season: fall through spring.
- Night, medium-weight shuffling: opossum. Slower and lighter than a raccoon, often with dragging sounds.
- Dawn and dusk, fast scurrying and rolling: gray squirrel. They leave at dawn to forage, return at dusk, sleep at night — Chattanooga's signature fall-winter attic call.
- Middle of the night, light rapid scurrying, sometimes in walls: flying squirrels (colonies of 10+, common on Signal Mountain and in Hixson) or rats.
- Dusk/dawn, high-pitched chittering with soft scratching: bats — usually from inside a wall or above a ceiling near the roost.
Step 2: What Do the Droppings Look Like?
- Large (2–3"), tubular, in one repeated "latrine" spot: raccoon. Do not handle — roundworm risk.
- Small pellets that crumble into shiny fragments, in piles: bat guano — the sparkle is insect exoskeleton.
- Rice-sized, pointed ends, scattered widely: squirrel.
- Rice-sized with blunt ends, along runways and near food: rat or mouse.
- Cat-sized, tapered, often near the entry: opossum.
Step 3: What's Damaged?
- Torn soffit, bent vent, shingles peeled back: raccoon — they break in with force.
- A neat 2" round hole chewed through fascia or at a roof joint: squirrel.
- No hole at all — just a stained 3/8" gap: bats don't chew; they use what exists. Common on the older rooflines of North Shore and St. Elmo.
- Chewed wires, PVC or wood anywhere in the attic: rodents or squirrels — and a genuine fire hazard if it's wiring.
- Nest of leaves, insulation and debris in one corner: squirrel or raccoon; bats don't build nests.
Step 4: What To Do About Each
Raccoons: one-way door + litter check + exclusion. See the raccoon attic guide. Squirrels (gray or flying): one-way doors and chew-proof sealing; flying squirrel colonies need the whole attic checked. Bats: exclusion only, and not while pups can't fly (roughly May–August in Tennessee). See bat signs. Rats: snap traps inside, exclusion outside — never poison in the attic. Opossums: cage trap, seal the entry, done — they don't return to sealed dens.
Still not sure what you've got? A licensed Chattanooga pro identifies species from the inspection in minutes — and the inspection is free. Species-by-species details live in our species guides.
Animal in the Attic — FAQ
The noise is loudest at 3 AM — what is it?
Night-only heavy noise points to raccoons or opossums; light rapid scurrying at night suggests flying squirrels (very common on Signal Mountain) or rats. Daytime activity, especially dawn and dusk, is classic gray squirrel. Bats you hear mostly at dusk/dawn as soft chittering.
Is it dangerous to sleep in the house with an animal in the attic?
Generally the animal wants nothing to do with you. The real risks are indirect: chewed wiring (fire), contaminated insulation, and — rarely — a rabid animal behaving oddly. But attic problems only grow — don't wait it out.
Should I put poison in the attic?
No. Poison in an attic means a dead animal in a wall void and weeks of smell, plus it's illegal for most wildlife species and dangerous to pets and predators. Removal plus exclusion is faster and cheaper than the poison aftermath.