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Attic noise comparison guide
What Is in My Attic? Comparing Squirrel, Rat, Raccoon and Bat Noises
Sounds narrow the list but rarely settle it. UGA Extension notes that attic noise at night could be mice, bats or flying squirrels, while noise during the day could be gray squirrels. Use the timing together with droppings, entry holes and other signs, and do not handle any animal you find.
Last reviewed October 19, 2026. Sources are listed at the end of the page.
Compare
Timing and signs, animal by animal
| Animal | When it is usually active | Other signs to check | Next step |
|---|---|---|---|
| Gray squirrel | Daytime; UGA calls squirrels diurnal | Holes that appear during the day; gables are a common entry point (UGA) | Squirrel removal |
| Flying squirrel | Night (UGA) | Entry through gables (UGA) | Squirrel removal |
| Roof rat | Night; travels along utility lines and fence tops at dusk (UC IPM) | Smudge marks on rafters and beams (UC IPM); raisin-size droppings (UGA) | Roof rat guide and rat control |
| Mouse | Night (UGA) | Rice-size droppings; small holes with chewed edges (UGA) | House mouse guide |
| Raccoon | Night; UGA lists it among nocturnal animals that cause holes | Entry holes; chimney noise can also mean a raccoon (UGA) | Raccoon removal |
| Bat | Night (UGA) | Bats can enter through dime-sized holes where cables and lines enter (UGA) | Bat guidance and removal |
Why sound is not enough: UGA lists mice, bats, squirrels, raccoons, skunks, opossums and birds as possible sources of attic or crawl-space noise. Several are active at the same hours, so treat the table as a starting point and confirm with physical signs or an inspection.
What you can check safely
- Note the time. Write down when you hear it: daytime activity points toward gray squirrels, night activity toward the others (UGA).
- Look from the outside. From the ground, check gables, soffits, roof edges and the places where cables and lines enter the house for holes or chewed edges (UGA).
- Look for droppings in areas you can reach without entering the attic. If you clean any up, follow CDC: ventilate, wear gloves, wet them with disinfectant and do not sweep or vacuum.
- Do not handle animals. UGA says homeowners should not attempt live capture of wild animals and not handle animals they cannot positively identify; CDC says to keep your distance from wildlife.
If it might be bats
CDC says to avoid touching bats, and if you find a bat in your home, to contact animal control or your health department so it can be safely captured for rabies testing, and not to release it until you talk with a public health expert. CDC also notes that bat bites can be tiny and may go unnoticed.
Georgia DNR advises avoiding bat exclusions between April 1 and July 31, when flightless young may become trapped inside. Do not seal openings or disturb a possible roost yourself. See Bat Removal for timing and next steps.
If someone was bitten or scratched
CDC says to wash any wound immediately with soap and water for 15 minutes and, if you were exposed to an animal that might have rabies, to contact your health department immediately. This is general information, not medical advice.
Common questions
Frequently asked questions
Can I tell a squirrel from a rat by the sound?
Not reliably. Timing helps, since UGA says daytime attic noise could be gray squirrels and night noise could be mice, bats or flying squirrels, but you need droppings, entry holes or an inspection to be sure.
Should I try to trap the animal myself?
UGA advises that homeowners generally should not attempt live capture of wild animals, and that trapping raccoons, which can transmit rabies, should be left to professionals.
The noise stopped, but now there is a smell. What does that mean?
An animal may have died in the attic or a wall. Avoid handling it; see Dead Animal Removal.
Where this information comes from
Sources
Facts about identification, biology and safety come from the sources below, retrieved on October 19, 2026. Publication or review dates are given where the source shows one.
- Resolving Human-Nuisance Wildlife Conflicts (Bulletin 1248), UGA Extension — by Michael T. Mengak; published with minor revisions November 3, 2023
- Rats and Mice: Get Them Out of Your House and Yard (Circular 970), UGA Extension — republished with minor revisions November 5, 2025
- Pest Notes: Rats (Publication 74106), UC Statewide IPM Program, University of California — updated June 2025
- Rabies Prevention and Control, CDC — dated July 1, 2025
- Preventing Rabies from Bats, CDC — dated July 1, 2025
- How to Clean Up After Rodents, CDC — dated April 8, 2024
- Excluding Bats From Your House, Georgia DNR Wildlife Resources Division — maternity-season guidance on exclusion timing
Related guides
Browse the full Atlanta Pest Library, or read a related guide:
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