Grey Squirrel Life Span. The eastern gray squirrel (sciurus carolinensis), also known as the grey squirrel depending on region, is a tree squirrel in the genus sciurus. Some of the critters' biggest predator threats are coyotes, red foxes, weasels, grey wolves, hawks and bobcats.
The presence of predators also has a big impact on squirrel populations and life expectancy.
Despite this brevity in life expectancy, some free roaming grey squirrels have actually surpassed 10 years in age. The life of a grey squirrel is variable. Lastly, parasitic infections can negatively affect their survival, as they can sometimes trigger extensive loss of fur. The lifespan of these squirrels is about a year;