House Mouse: Size: 2 1/2 - 3 3/4" long, dusty gray with a cream belly. Relatively large ears and small, black eyes.
 
Biology: The house mouse is the most common rodent pest in most parts of the world. It can breed rapidly and adapt quickly to changing conditions. In fact, a female house mouse can give birth to a half dozen babies every three weeks, and can produce up to 35 young per year. They prefer to eat cereal grains, they are nibblers and will sample many different foods. Mice have keen senses of taste, hearing, smell, and touch. They also are excellent climbers and can run up any rough vertical surface.
House Mouse