Deer Mouse


Actual Size: 5–8″

Characteristics: Varies in color from gray-brown to red-brown with a white underside and white feet.


  • Prefer to nest in dark outdoor areas.
  • Known to spread several infectious diseases including hantavirus and Lyme disease
  • Can reproduce throughout the year.

Most often found in rural areas outdoors, deer mice rarely invade residential properties. That said, they are still a common problem in agricultural areas, outbuildings, sheds, and more. Their true danger lies in the fact that they are common carriers of hantavirus. They feed at dusk and dawn, and tend to prefer insects, seeds, nuts, berries, and more.

Deer Mice Behaviors

Throughout most of the year, deer mice nest in outdoor areas that are quiet, dark, and undisturbed. Some of the most common shelters include fence posts, hollow tree logs, piles of debris, and more. When the weather gets colder during the winter, deer mice tend to invade homes, garages, sheds, and sometimes even vehicles. When they get indoors, they are often found in basements or attics.

The biggest threat of deer mice is the fact that they are able to transmit the dangerous—and potentially fatal—hantavirus. This disease is often transmitted through contact with mouse carcasses, or by breathing in air-borne urine droplets from infested deer mice.

Preventing and Controlling Deer Mice

Preventing rodents can be difficult and complex; rodents are intelligent and very resourceful creatures. Complete rodent control should consist of four steps: inspection, exclusion, trapping, and exterior Baiting. The pest control professionals at Pest Defense Solutions can evaluate a building for rodent infestation and inspect all current access points. After inspection, all access points will be blocked. A pest control expert will then use trapping to remove the remaining rodents, and also use long-term exterior baits to prevent roof rats from returning to the building.