House Mice vs Deer Mice in Alberta: How to Tell the Difference

28 October 2026

By BugsNPests · Last reviewed 28 October 2026 · 5 minute read

Quick answer: deer mice have a white belly, white feet, big eyes and a tail that is brown on top and white underneath. House mice are a plain grey-brown with a nearly hairless tail and smaller eyes. In Alberta, deer mice matter most because they are the main concern for hantavirus. The risk is low, and safe clean-up lowers it further.

Key takeaways

Two-tone colouring and a white belly point to a deer mouse. Plain grey-brown points to a house mouse.
Deer mice often come from fields, ravines and outbuildings. House mice live in and around buildings.
Never sweep or vacuum droppings from either mouse.
Seal entry points and call for an inspection if you find droppings in more than one spot.

Found a mouse and not sure which one? Send a photo on WhatsApp to 780-716-3943 for a free ID, or call us 24/7.

House Mouse vs Deer Mouse: Quick Comparison

Feature	House mouse	Deer mouse
Colour	Uniform grey or light brown	Brown on the back with a white belly and white feet
Tail	Nearly hairless and scaly, one colour	Brown above, white below (two-tone) and lightly furred
Eyes and ears	Smaller	Larger and more prominent
Where it usually lives	In and around buildings, year-round	Fields, woods, ravines and outbuildings, moving indoors in fall
Smell	Strong musky odour	Less noticeable
Main concern	Food contamination, gnawing and wiring damage	The same, plus hantavirus risk in Alberta

Colour and tail shape are the easiest clues. If you can only see droppings, they look similar, so treat all droppings with the same care.

Why Deer Mice Matter in Alberta

Alberta Health Services names deer mice as the main concern for hantavirus in the province. The illness is rare, but it can be serious. People are usually infected by breathing in tiny particles from dried droppings, urine and nesting material that has been disturbed. That is why sweeping, vacuuming and cleaning in a closed shed or cabin are the riskiest ways to clean up.

House mice are not the main hantavirus concern, but they still contaminate food and surfaces, chew wiring and spread germs. Every mouse should be removed and every clean-up done safely.

Where You Are Most Likely to Meet Deer Mice

Sheds, garages, barns and storage buildings
Cabins, trailers and seasonal properties that sit empty
Acreages and houses backing onto fields, ravines or tree lines
Wood piles and stacked boxes near the house

Edmonton note: as nights turn cold in fall, both kinds of mice look for warm, sheltered spaces. Garages, basements and crawl spaces on the edge of the city are common first stops.

Signs You Have Mice (Either Kind)

Small dark droppings along baseboards, behind appliances and under sinks
Scratching in walls or ceilings at night
Gnawed packaging or wiring
Shredded nesting material in hidden corners
A musky smell
See our full guide: signs of mice in your house.

How to Clean Up Safely

Open doors and windows to ventilate the space, and wear rubber gloves.

Soak droppings, nests and dead mice with a bleach and water mix (1 part bleach to 9 parts water) or a household disinfectant. Let it sit for about 5 minutes.

Wipe up with paper towels, place everything in a plastic bag and dispose of it.

Never sweep or vacuum droppings.

Wash your gloves before taking them off, then wash your hands.

For large infestations or enclosed spaces with poor ventilation, call Health Link at 811 before you start. If you develop flu-like symptoms or trouble breathing after exposure, see a doctor and tell them about the mice.

What to Do and What Not to Do

Do	Do not
Ventilate sheds and cabins before you go in	Sweep or vacuum droppings or nests
Wet droppings with disinfectant first	Dry-wipe or blow dust
Wear gloves and wash your hands afterward	Handle dead mice with bare hands
Seal gaps and store food in sealed containers	Block holes with paper or foam alone
Call a professional for large or repeat infestations	Ignore a problem that keeps coming back

When to Call a Professional

Call us if you find droppings in more than one area, hear scratching in walls or the attic, find a nest, or have a shed, cabin or garage with heavy mouse activity. We find the entry points, remove the mice and seal the gaps so the next ones cannot follow.

Call 780-716-3943 now, WhatsApp us a photo, or request a free quote. We answer 24/7.

Mice Control Plans and Prices in Edmonton

Starting prices, GST extra. You get a free quote before any work starts.

Plan	Starting at	Best for
30-Day Mice Control	$450	A new problem caught early
90-Day Mice Elimination Plan	$600	Established or repeat infestations
12-Month Rodent Protection Plan	$950	Homes that get mice every fall

FAQs

How can I tell a deer mouse from a house mouse?

Deer mice have a white belly, white feet, big eyes and a tail that is brown on top and white underneath. House mice are a uniform grey-brown with a nearly hairless tail and smaller eyes.

Do deer mice carry hantavirus in Alberta?

Yes. Alberta Health Services names deer mice as the main concern. The risk is low, but infection can be serious, and it usually comes from breathing in dust from droppings, urine or nests.

How do people catch hantavirus from mice?

Mostly by breathing in tiny particles from dried droppings, urine and nests, especially when they are disturbed by sweeping, vacuuming or cleaning in closed spaces.

Are house mice dangerous too?

House mice can contaminate food and surfaces, chew wiring and spread germs, so they should still be removed and cleaned up safely, even though deer mice are the main hantavirus concern.

What should I do if I find mouse droppings in a shed or cabin?

Ventilate the space first, wear gloves, wet the droppings with a bleach and water mix or disinfectant, wipe up with paper towels and bag them. Never sweep or vacuum. For large infestations call Health Link at 811.