Mice are active mostly at night, but can be seen occasionally during daylight hours. House Mouse Facts House mice are small rodents with relatively large ears and small black eyes. They weigh about ounce and are usually light gray in color. Although house mice usually feed on cereal grains, they will eat almost anything. They are sporadic feeders, nibbling bits of food here and there.
Mice have keen senses of hearing, smell, taste, and touch.
They are excellent climbers and can run up any rough vertical surface. They will run horizontally along wire cables or ropes and can jump up 12 inches from the floor onto a flat surface. Mice can squeeze through openings slightly larger than inch in diameter. In a single year, a female may have five to ten litters of usually five or six young each. Young are born 19 to 21 days after mating, and they reach reproductive maturity in six to 10 weeks.