We only had the red fox squirrels here until recently. Now the eastern gray squirrels are moving in with their black variant. When I was a kid the black squirrels lived near the river but not around here, no we have a rainbow of hybrids. Black ones, red fox, gray ones with white bellies and tufted ears, red with black tails, red with white bellies. The grays were smaller at first but they seem to be gaining in size, must be the hybrids. I'm told the grays will eventually take over. There are still Reds here anyway.
Anyway, it's fun to watch.