Home Identification guide
Identification · Oxford, Mississippi
Rat or mouse? How to identify what is in your house
Knowing what you have decides where the gaps are and where the traps go. Here is how to tell a house mouse from a roof rat from a Norway rat, and the look-alikes people mix them up with in north Mississippi.
- Side-by-side table
- Droppings guide
- 6 look-alikes
- Send us a photo
In a hurry? Jump to the comparison table.
Start here
How can you tell a rat from a mouse?
Look at the size, the tail and the droppings. A house mouse has a body about 2.5 to 3.75 inches long, a thin tail about as long as its body, and droppings 1/8 to 1/4 inch long. A roof rat weighs about 5 to 10 ounces, has large ears and a tail longer than its head and body, and leaves pointed droppings about 1/2 inch long. A Norway rat weighs about 7 to 18 ounces, has small ears, a blunt nose and a tail shorter than its body, and leaves blunt droppings about 3/4 inch long. Roof rats live high, in attics. Norway rats live low, in crawl spaces and burrows. Mice can be anywhere, often in kitchens.
Side by side
House mouse vs roof rat vs Norway rat
Rat weights and ear and tail tests from University of California IPM; mouse size from the National Pest Management Association; entry gaps from the CDC.
| Feature | House mouse | Roof rat | Norway rat |
|---|---|---|---|
| Size | Body 2.5 to 3.75 inches | 5 to 10 ounces, slim | 7 to 18 ounces, heavy |
| Tail | About as long as the body, 2.75 to 4 inches | Longer than head and body | Shorter than head and body |
| Ears | Large for its size | Large; reach the eyes when folded | Small; do not reach the eyes |
| Nose | Pointed | Pointed | Blunt |
| Fur | Dusty gray, cream belly | Brown with black, pale belly | Brown with black, gray belly |
| Droppings | 1/8 to 1/4 inch, pointed | About 1/2 inch, pointed | About 3/4 inch, blunt |
| Lives | Kitchens, walls, cabinets, garages | Attics, rafters, trees, wall tops | Crawl spaces, burrows, ground floors |
| Gets in through | A gap about 1/4 inch | Roofline gaps about 1/2 inch | Foundation and crawl space gaps about 1/2 inch |
The fold test: if you find a dead rat, fold the ear forward. If it covers the eye, it is a roof rat. If it does not, it is a Norway rat. Fold the tail toward the head too: a roof rat’s reaches the snout. More on both on our rat control page.
Look-alikes
Six animals people mistake for rats and mice in Mississippi
Not everything small and gray is a house mouse.
Young rat
A young rat can be mouse-sized. Look for a big head and big feet for its body. An adult mouse has small feet and a small head.
Deer mouse
White belly and feet and a sharply two-toned tail. Shows up in sheds, cabins and camps more than houses. The main U.S. hantavirus carrier, so clean up its droppings the CDC way.
Cotton rat
Coarse, grizzled brown-gray fur and a shorter tail. A field and roadside rodent common in the South; it rarely moves into homes but turns up in barns and sheds.
Vole
Stocky, with a short tail and small ears almost hidden in fur. Lives in lawns and gardens, tunneling under mulch. Rarely comes inside.
Shrew
Very pointed snout, tiny eyes, velvety fur. Not a rodent at all; it eats insects. Often found dead on a patio or in a garage.
Flying squirrel
Small, gray-brown, with big dark eyes and a fold of skin between its legs. Active at night in attics, so it gets mistaken for rats.
Signs they leave
Signs that tell you which rodent you have
You rarely see the animal. You almost always see what it leaves behind.
Droppings
The best single clue. Size and shape point to the species; where you find them points to the entry point.
Gnaw marks
Small, fine scratches mean mice. Larger, rougher chewing on wood, wiring or plastic pipe usually means rats.
Grease marks
Dark smudges along walls, beams and pipes where rats rub as they travel. Mice leave little or none.
Runways and tracks
Rats wear paths along walls and fences. Norway rats dig burrows beside foundations and under slabs.
Nests
Shredded paper, insulation and fabric. Mice nest in drawers and walls; roof rats in attic insulation.
Sounds and timing
Night scratching overhead points to roof rats or mice. Daytime noise points to squirrels. See our attic noises guide.
Found droppings? Clean them up safely with our CDC cleanup guide. Holes in the lawn instead? See our yard rodents guide.
Where you found it
Where you found it, and what it probably is
Location narrows it down fast.
| Where | Most likely | Also possible |
|---|---|---|
| Attic, at night | Roof rat | House mouse, flying squirrel |
| Attic, by day | Gray or fox squirrel | Roof rat in a heavy infestation |
| Kitchen drawers and pantry | House mouse | Roof rat if droppings are large |
| Crawl space | Norway rat | House mouse |
| Burrows by the foundation | Norway rat | Vole or chipmunk in garden beds |
| Garage, shed or camp | House mouse | Deer mouse, cotton rat |
| Car engine bay | House mouse | Roof rat or Norway rat |
| Lawn and garden tunnels | Vole or mole | Norway rat near structures |
Not sure what you have?
Tell us what you are seeing
Call or send the form. Describe the droppings, the sounds and where they are, and we will tell you on the phone what it most likely is and what happens next.
Send a photo
How to photograph droppings so we can identify them
One good photo saves a lot of guessing.
A clear photo of droppings next to a coin tells us more than almost any description. We can usually tell mouse from rat, and roof rat from Norway rat, from one good picture.
Take the photo before you clean, then follow the CDC cleanup steps. Do not touch droppings bare handed.
- Put a coin next to the droppings for scale
- Shoot straight down, in good light
- Take a second photo showing where in the room they are
- Photograph any gnaw marks or grease marks
- Note when you hear noise, and where
- Wear gloves; do not sweep or vacuum
Request a callback
Tell us what you’re hearing
Prefer not to call right now? Send this instead and we call you back. No mailing list, no door knockers, no door-to-door sales.
Straight answers
Rodent identification questions
Is it a baby rat or a mouse?
Look at the head and feet. A young rat has a large head and oversized feet for its body. An adult house mouse has a small head and small feet, and its tail is thin and about as long as its body.
What is the difference between a roof rat and a Norway rat?
Roof rats are slimmer, 5 to 10 ounces, with large ears, a pointed nose and a tail longer than their body, and they live high in attics. Norway rats are heavier, 7 to 18 ounces, with small ears, a blunt nose and a shorter tail, and they live low, in crawl spaces and burrows.
Which rats live in Oxford, MS?
Both roof rats and Norway rats. Roof rats are the common attic rat in Oxford’s older, tree-shaded neighborhoods. Norway rats show up around crawl spaces, foundations, dumpsters and creeks.
How big are mouse droppings compared to rat droppings?
Mouse droppings are 1/8 to 1/4 inch, about the size of a grain of rice. Roof rat droppings are about 1/2 inch with pointed ends; Norway rat droppings about 3/4 inch with blunt ends.
Are deer mice dangerous?
Deer mice are the main carrier of hantavirus in the U.S. The Mississippi State Department of Health says no hantavirus cases have been reported in the state since 1993, but the CDC still advises airing out and wet-cleaning droppings in sheds and camps.
Can I identify a rodent by its sounds?
Partly. Night scratching overhead usually means roof rats or mice; daytime running and chattering points to squirrels. Droppings confirm it.
Do voles come into houses?
Rarely. Voles live in lawns and gardens and tunnel under mulch and grass. If you are finding droppings indoors, it is almost always a mouse or rat.
Keep reading
Related rodent help for Oxford homes
From the blog: questions people ask
Sources
Last reviewed October 2026 by the Rodent Control Oxford team. Biology and control standards follow Mississippi State University Extension and the CDC. Price ranges are labeled benchmarks; your price comes in writing after we inspect.
- UC IPM, Rats Pest Notes
- National Pest Management Association, House Mice
- National Pest Management Association, Roof Rats
- National Pest Management Association, Norway Rats
- CDC, Seal Up
- University of Nebraska-Lincoln Extension, Controlling House Mice
- Mississippi State Department of Health, Hantavirus
- Mississippi State University Extension, Controlling Mice and Big Ole Rats
Oxford & Lafayette County
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