Indoors they often nest in various materials such as insulation. If active, free to dust and cobwebs. Frequently use the same paths, usually along walls, stacked merchandise, etc., and to interior objects. Active runways free of dust and cobwebs, with fresh droppings. Tracks may or may not be visible.
Mice prefer seeds or cereals.
The house mouse is a prolific breeder. They reach sexual maturity in 35 days. More than 1 litter may be present in the nest at one time. Life expectancy is normally less than 1 year, but mice have been known to live as long as 6 years. They are excellent climbers and can run up most roughened walls.