House Mouse


Actual Size: 5” to 8” long (tail included)

Characteristics: Light brown to gray to nearly black. Large ears compared to the body.

Habitat: Outside, they build nests near trees. Inside, they inhabit wall voids, cabinets, and garages.


  • House mice quickly reproduce—in an 8 month period, 24 mice can multiply to 2000 mice.
  • They can transmit pathogens that cause diseases such as salmonella.
  • They will make as many as 200 visits to a food source in one night.

House Mice in SE Louisiana and Mississippi

The house mouse is found across the United States and ranks as the number one rodent pest in most cities and suburban areas, including right here in the South. House mice are commensal, meaning they are generally found living in close association with humans and dependent upon the human habitat for shelter and food. These small rodents thrive throughout the year and can be found in homes, commercial buildings, open fields, and agricultural lands. They contaminate food meant for humans and pets as they forage, dropping feces and urine along the way. They may be smaller than rats, but house mice can still cause considerable damage to structures by chewing through walls and transmit pathogens that cause diseases like salmonella, a form of food poisoning.

House Mouse Habitat

When they are outdoors, house mice will construct nests in fields and beneath trees and shrubs. Indoors, mice will build nests in quiet undisturbed places like wall voids, kitchen cabinets, attics, and garages. Droppings, fresh gnaw marks, and tracks or rub marks indicate areas where mice are active. Nests are made from finely shredded paper or other fibrous material, usually in sheltered locations. House mice have a characteristic musky odor that reveals their presence. Just like most rodents, house mice are mostly seen at night. However, they will be seen during the day especially when there are serious infestations.

House Mouse Behaviors, Threats, or Dangers

In omnivorous creatures, mice typically gravitate toward cereals and grains. House mice contaminate food and are implicated in the transmission of diseases such as salmonella and bubonic plague. The house mouse can cause significant damage to structures by gnawing and tunneling through walls. Mice have also been implicated in the generation of fires and explosions in homes and buildings. Chewed, exposed wires inside walls can spark, causing interior walls to catch fire. Because house mice can reproduce at such a rapid rate, their infestations can be very dangerous if not controlled.

When you notice a house mouse infestation on your property, always contact a licensed rodent control company.