Deer Mouse

Peromyscus maniculatus

Fact Sheet: English, Spanish.

Deer Mice

Adult deer mouse (David Cappaert, Michigan State University,

deer mouse

Deer mouse (6th Happiness, Wikimedia Commons)

Deer mouse

Deer mouse (Jack Kelly Clark, UC Statewide IPM Project)


  • brown to gray colored body with a white belly, furry tail and ears smaller than that of a house mouse
  • 6 inches long, including tail
  • multiple species exist

Nesting Habits

  • prefer rural areas including fields, pastures and vegetative areas around buildings
  • move indoors when it gets cold outside


  • seeds, fruits, vegetation, berries, nuts and insects


  • known carrier of Hantavirus Pulmonary Syndrome, a rare but potentially fatal lung disease found in mouse feces and urine

IPM Recommendations

  • Deer mice are only occasional invaders in buildings.
  • Install tight-fitting door sweeps.
  • Seal exterior cracks, crevices and areas around pipes and electrical conduits that enter buildings through walls.
  • Reduce clutter indoors and outdoors.
  • Minimize nesting habitat around property.
  • Keep all exterior doors closed.
  • Store food in pest-proof containers.
  • Use snap-traps placed with triggers toward baseboards, especially in dark corners.
  • Train kitchen and custodial staff to clean thoroughly.
  • Clear high weeds that serve as food and shelter during warm weather.

Additional Resources:

IPM for Rats and Mice: Integrated Pest Management in Sensitive Environments (University of Nebraska-Lincoln Extension)