We actually have lots of black squirrels around here, but they seem to be in "pockets"...some areas have alot. I asked a wildlife rehab'er I know, and she said they are Eastern Gray Squirrels in a "black phase"...I don't think that means they'll turn gray. I'm pretty sure they inter-breed with the grays. At first I only saw one, with the large group of grays that come...then I started seeing 3, and 2 I think were babies. Hard to tell the babies, they're almost as big as the adults by the time they come around. Last June, I had an orphaned litter of 6 come down out of a big pine tree (screaming and crying for hours on their way down). They were no bigger than a 3 wk. old kitten. I finally coaxed a couple of the braver ones into my yard, and they ran right up my pants legs, out onto my arm to get the peanut butter sandwich I was enticeing them with. What a thrill!! I foolishly boosted them all into a hollow in my maple tree, and a raccoon got after them during the night. The two I saved, I took to the wildlife rehab'er the next day. I'll know not to leave them alone if it ever happens again. I think those big teeth the mom has are their only defense.