The mice most commonly encountered indoors are house mice. They are most commonly gray and brown in color, although some specimens may be white or black. House mice are nocturnal in nature and eat a variety of foods, including fruit, carrion and rotting vegetables.
Country mice are fast, small and highly inquisitive. However, they are not good at defending themselves from predators, and most specimens do not live more than a year. Researchers are unsure of the house mouse’s life span in natural conditions, as studied specimens tend to be consumed before they die of natural causes. Birds, snakes, foxes, rabbits and other rodents are common house mouse predators.
Despite their vulnerability to predators, country mice populations remain steady. Once sexually mature, females reproduce approximately every other month and give birth to a number of young each time.