House Mouse

Actual Size: 5” to 8” long including the tail

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.


  • Will eat just about anything they come across, especially inside of a residential environment.
  • Can transmit pathogens that cause diseases such as salmonella.
  • Will make as many as 200 visits to a food source in one night.
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House Mice in Nevada

House mice are extremely social rodents that organize social hierarchies within a population. They are known for being great climbers and jumpers, but are colorblind and cannot see very well beyond six inches. They typically eat very small amounts of food at a time and usually nest in dark and secluded areas of the home. House mice are much smaller proportionally than rats, particularly in the head and feet, and will continually excrete their waste as they move about. The house mouse has a light-colored belly, but their other skin and hair color can vary from light brown all the way to black.

House Mouse Habitat

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. House mice thrive throughout the year and can be found in homes, commercial buildings, open fields, and agricultural lands. House mice will also reproduce rapidly, and are extremely mobile. Because of their smaller frames, house mice can fit into spaces as small as a dime. They will utilize power lines and foliage to gain access to attics and rooftops, and once within a house will use pipe chases and interior wall voids to move from area to area. Some of the places they’re most frequently found inside are in paper products, cotton, packing materials, wall insulation, and fabrics.

House Mouse Behaviors & Dangers

Because house mice live in bigger populations, their threats can be serious. They carry diseases and contaminate stored food inside of the home, and have even been known to spread salmonella through their feces. 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.

If you have noticed house mice in or near your Las Vegas area home, contact your local rodent exterminators for help!