In 1914 the black squirrel was introduced in Vancouver and since then they have spread throughout Vancouver - North Shore - Fraser Valley. They have also spread from Vancouver into the Washington State area.
Black squirrels also can be found in Europe: England has several black squirrel populations in Hertfordshire, Bedfordshire, Cambridge and other locations. Such animals have been found in the eastern area of Russia as well.
As you can see black squirrels can be found all around the world and their population is getting bigger and bigger by the day. These squirrels are actually grey squirrels with high levels of black melanin in their hair.