Deer Mice | Pest ID & Control Guide
Quick Facts About Deer Mice
Deer mice live mostly outdoors in fields and woods, but they move into garages, sheds, cabins, and homes when the weather cools. In Tennessee, the closely related white-footed mouse is also common, and the two look nearly identical. Both matter because they can carry hantavirus.- Size: About 3 to 4 inches long, plus a tail of similar length
- Color: Gray to reddish-brown on top with a bright white belly and feet
- Tail: Sharply two-toned: dark on top, white underneath
- Features: Large, bulging eyes and big ears
- Where found: Rural and wooded properties, garages, sheds, barns, cabins, and vehicles
- Main concern: Can carry hantavirus in droppings and urine
What Do Deer Mice Look Like?
The sharp line between the dark back and the white belly is the easiest way to recognize a deer mouse.Deer Mice vs. House Mice
House mice are a fairly even gray-brown with a lighter belly, not a crisp white one, and their tails are one color. Deer mice have bigger eyes, bright white feet, and a two-toned tail. See our house mouse guide.
Where Deer Mice Nest
- Garages, sheds, barns, and outbuildings
- Cabins, seasonal homes, and campers left closed up
- Stored vehicles, boats, and equipment, including engine compartments and air filters
- Woodpiles, hollow logs, and stone walls near the house
- Attics, crawl spaces, and wall voids, especially in fall and winter
- Drawers, boxes, and upholstered furniture in storage
Signs of Deer Mice
- Droppings: Small, dark droppings in outbuildings, drawers, and stored items
- Seed caches: Piles of seeds, nuts, or pet food hidden in boots, drawers, or boxes
- Nests: Soft nests of shredded fabric, insulation, or plant material
- Chewed items: Damage to stored furniture, bedding, and vehicle wiring
Health Risks: Hantavirus
Deer mice are the main carrier of hantavirus in North America, and white-footed mice can carry it too. People are usually exposed by breathing dust from dried droppings, urine, or nesting material, most often when cleaning a shed, cabin, or garage that’s been closed up. Hantavirus infection is rare, but it can cause a serious lung illness, so early flu-like symptoms after cleaning up rodent debris should be reported to a doctor.
White-footed mice are also important hosts for the blacklegged ticks that spread Lyme disease. See our deer tick guide.
How to Clean Up Safely
- Air it out: Open doors and windows for at least 30 minutes before you start.
- Don’t sweep or vacuum: That puts particles into the air.
- Wet it first: Wear rubber gloves and soak droppings and nests with disinfectant or a bleach solution for several minutes.
- Wipe and bag: Pick up the material with paper towels, seal it in a bag, and throw it out.
- Clean up after: Disinfect the area and wash your gloved hands, then your hands.
How to Keep Deer Mice Out
- Seal the building: Close gaps around doors, vents, and utility lines in homes and outbuildings.
- Store items in sealed containers: Especially bedding, clothing, and seed in garages and sheds.
- Protect vehicles: Check stored vehicles and equipment regularly.
- Move woodpiles away: Keep firewood and brush away from the house.
When to Call a Professional
Call if you find droppings indoors, in a cabin or seasonal home, or in large amounts anywhere. A technician can seal entry points, remove the rodents, and advise on safe cleanup. See our rodent control services.
Frequently Asked Questions
How can I tell a deer mouse from a house mouse?
Deer mice have a sharply two-toned coat with a bright white belly and feet, large eyes, and a tail that’s dark on top and white underneath. House mice are a more even gray-brown.
Do deer mice carry hantavirus in Tennessee?
Deer mice and white-footed mice can carry hantavirus. Infections are rare, but it’s wise to clean up droppings carefully by wetting them with disinfectant rather than sweeping or vacuuming.
Where do deer mice live?
Mostly outdoors in fields and woods, but they move into garages, sheds, cabins, stored vehicles, and homes in cooler weather.
How should I clean up deer mouse droppings?
Air out the space, wear gloves, soak droppings and nests with disinfectant, then wipe them up with paper towels and bag them. Never sweep or vacuum them dry.
Why do deer mice get into cars?
Engine compartments and air filters offer warm, sheltered nesting spots, especially in vehicles that sit unused.
