Track Tracks are seldom noticed; similar to those of Deer Mouse.
Sign Musky odor. In buildings: small dark droppings, damaged materials, holes in insulation, and shredded nesting material; in fields: small dark droppings, small holes in the ground. Makes nests in sheltered places in buildings, usually of shredded paper, cardboard, or other material. In old buildings, may make round holes in walls or near floorboards.
Scat: Small droppings, like black grains of rice, found singly or in small groups.