The black form of Eastern Gray Squirrel occurs as a “melanistic” subgroup. It is particularly abundant in the northern part of the mammal’s range.
This is due to black squirrels having a considerably higher cold tolerance than that of gray colored squirrels.
In addition, because the northern forests are more dense and therefore darker, dark colored squirrels have the benefit of better concealment in their dimly lit habitat.
The black color is most likely the result of a mutation, which probably occurred by chance. As it turns out, the color mutation was favorable to the survival of the squirrels, became passed down through generations and spread.
Although somewhat common in northeast Ohio, the rarity of the black squirrel has caused many people to admire them, and they enjoy great affection in some places as mascots.