What this actually means for the structure of the foot is a question that is still being researched today. It would seem that an accessory navicular is commonly related to pes planus. Frederick Kidner, in 1929, first theorized that the presence of an accessory navicular could be the cause of pes planus.
Successful as they are, Eastern Gray Squirrels live only 11-12 months on average, but some individuals have survived more than ten years in the wild. Factors affecting survival include the severity of winter, abundance of food, and parasites.
Habitat and range. Gray squirrels live in hardwood forests, wooded parks and residential areas. They are found throughout Minnesota but are most common in hardwoods in the central part of the state. They make their homes in tree cavities but also build leafy nests in summer and fall.he eastern gray squirrel and eastern fox squirrel are among the most sought-after small game animals in Minnesota. A squirrel pressed in hiding against a tree is a challenging target. Moreover, its speed on the ground and through the treetops has vexed many a squirrel hunter.