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.
A: Eastern Grey Squirrels are omnivores, and as such eat a variety of food, including various parts of many different tree species, plants, fungi, bird eggs and nestlings, frogs, bugs and bones. Squirrels store food in a process known as scatter hoarding. Squirrels feed from various parts of many different trees.