Northwestern deer mouseThe northwestern deer mouse, northwestern deermouse, or Keen's mouse is a species of rodent in the family Cricetidae. It is a species of the genus Peromyscus, a closely related group of New World mice often called "deermice".DistributionIt is found in British Columbia in Canada and in Alaska and Washington in the United States.HistoryIt was named after the Rev. John Henry Keen in 1894.Mode of nutritionThis type of rodent consumes and scatters seeds that are present in black bear scats. They also hoard seeds to store for winter survival.