why are some squirrels black
The black fur color can occur naturally as a mutation in populations of gray squirrels, but it is rare. The rarity of the black squirrel has caused many people to admire them, and the black squirrels enjoy great affection in some places as mascots. In several U.S. states, as well as in Canada and the United Kingdom, black squirrels have been introduced into the wild in the hope of increasing their numbers.