Bruce Rauner, Governor

DNR Links Skip to Content Skip to State Links

 IDNR Home
 Agency Offices
 Disabled Outdoors
 Freedom of Information Act
 Get Involved
 Grant Info
 Great Lakes Restoration
 License / Permit / Register
 Kids & Education
 Law Enforcement
 Mandatory Safety Programs
 Lodges / Leasing
 More Links
 Outdoor Recreation
 Parks & Recreation
 Press Releases
 State Museums
 World Shooting & Recreational Complex
 DNR A to Z


  House mouse  

Department of Natural Resources

Illinois Exotic Species:
House mouse Mus musculus

The house mouse has a head-body length of three to three and one-half inches. Its tail is about three to three and three-fourths inches long. The back is black or gray. The belly is gray or buff while the feet are gray-brown. The prominent ears have few hairs on them. The ringed, scaly, nearly hairless tail is the same color as the back. When viewed from the side, a notch may be seen at the tip of each upper incisor.

This mammal may be found statewide in Illinois. It lives in fields or buildings. The house mouse will eat any human food, livestock feed, seeds, fruits and insect larvae. It is a good climber and swimmer. It is primarily nocturnal. Mating may occur at any time throughout the year. The gestation period is about three weeks. Litter size ranges from two to 10, and a female may produce five or six litters each year. Young are born helpless but develop rapidly. A female attains sexual maturity at the age of about one and one-half months. The house mouse was introduced to the United States from Europe by humans and has spread tremendously.

Exotic Species Photo Gallery | Exotic Species Intro Page | Wild About Animals | Wild About Plants

Kids & Education

 New This Month
 Online Order Form
 Student Pages

Copyrightę 2015 Department of Natural Resources
Accessibility    Contact    FAQs    Podcasts    Privacy    Social Networking