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.
Eastern gray squirrels feed mostly on nuts, seeds, flowers and buds of various trees. These trees include maple, mulberry, hackberry, elm, and dogwood. The seeds they eat usually come from cedar, hemlock, pine, and spruce.They also eat a variety of herbaceous plants and fungi.ou can tell eastern grey squirrels apart from fox squirrels by their white tipped fur and white or grayish belly. Eastern grey squirrels often have a lot of red in their fur. Fox squirrels have red-tipped fur and red bellies. Eastern grey squirrels are usually smaller than fox squirrels.