Deer Mouse Deer Mouse Tracks Natural History of Deer Mice Deer mice are common nocturnal mammals.
Adults are brownish gray.
Juveniles are gray. Both have dark eyes and white feet and undersides. They have four toes on the forefeet and five toes on the hind feet. Their tracks are commonly found on the fine beach sand of river bars and in soft mud. Tracks are usually in groups of four with a trail width less than two inches.