Mus musculus
Rodent
2.5 to 3.5 inches body, plus 3 to 4 inch tail
Light brown to dark gray with cream belly
9 to 12 months in the wild, up to 3 years indoors
About the House Mouse
The house mouse is the most common rodent pest in Michigan homes. A single female produces 5 to 10 litters of 5 to 6 pups per year, meaning one mouse becomes 30 in a few months. House mice contaminate food, gnaw wiring, and spread hantavirus, salmonella, and leptospirosis.
Habits & Behavior
House mice are nocturnal and highly curious, investigating new objects within 24 hours. They nest in wall voids, attic insulation, under appliances, inside stored items, and within 20 to 30 feet of a food source. A mouse can squeeze through a 1/4-inch gap the width of a dime.
Signs of a House Mouse Infestation
Pepper-like droppings 1/8 to 1/4 inch long along walls, under sinks, in drawers
Gnaw marks on food packaging, wood, wire insulation, drywall corners
Greasy rub marks along baseboards and travel paths
Scratching or scampering sounds in walls, ceilings, or floors at night
Urine stains visible under UV light on counters, baseboards, nesting areas
Shredded paper, fabric, or insulation assembled into softball-sized nests
House Mouse Pressure in Michigan
Michigan house mice peak in early fall (September to November) as outdoor temperatures drop and mice seek warm shelter. Commercial corridors, restaurants, and dense housing drive year-round pressure. Older Detroit-area housing stock with unsealed foundation gaps, utility penetrations, and dryer vents allows easy entry.
How BTR Treats House Mouse Infestations
BTR Pest Control uses a three-step program: (1) interior tamper-resistant bait stations and snap traps in high-activity zones, (2) exterior perimeter rodent bait stations around the foundation, (3) exclusion work to seal entry points including utility penetrations, weep holes, garage door sweeps, and dryer vent gaps. Most Michigan homes need 3 visits across 6 weeks for full elimination.
Prevention Tips
Seal all exterior gaps larger than 1/4 inch with steel wool and caulk. Trim vegetation 18 inches from the foundation. Store pet food and grain in sealed containers. Maintain garage door sweeps. Schedule annual rodent exclusion inspections before each fall.
Frequently Asked Questions About House Mouses
What do house mice eat?
House mice prefer seeds, grains, and high-carbohydrate foods but will eat nearly anything including pet food, soap, wax, and glue. Each mouse eats about 3 grams of food per day but contaminates 10 times that amount with droppings and urine.
How do I know if I have mice or rats?
House mouse droppings are 1/8 to 1/4 inch long and pointed at both ends. Rat droppings are 1/2 to 3/4 inch long and blunt or curved. Mouse sounds are light scampering; rat sounds are heavier thumping. Mice leave smaller greasy rub marks than rats.
Can mice climb walls?
Yes. House mice are excellent climbers and can scale rough vertical surfaces, including brick, wood siding, and interior drywall. They jump 12 inches vertically, swim short distances, and travel along utility lines from tree branches onto roofs.
How long does it take BTR to eliminate a mouse infestation?
Most Michigan homes require 3 visits across 6 weeks. The first visit sets interior traps and exterior bait stations and identifies entry points. The second visit removes captured mice, replenishes bait, and performs exclusion work. The third visit confirms activity has stopped and completes any remaining exclusion. Severe infestations require additional visits.
Are your mouse control products safe around pets and children?
Yes. BTR uses tamper-resistant bait stations that only open with a specialized key. Interior traps are placed where pets and children cannot reach them. Exterior rodenticides stay locked in metal bait stations secured to the ground.
House Mouse Problem? BTR Can Help Today
Free inspection. Licensed Michigan exterminators. 90-day warranty on most services.