I believe they are Eastern Gray squirrels.
I raised a baby squirrel when I was a kid. Bottle-fed him until he matured a bit. Very smart and lots of fun.
He used to go out in the day and play in the trees and come scratching at the screen door at dinner time.
Everything was fine until he met that slut who lived in the trees out back. He ran away with her to raise a family and left us in the rearview mirror.;-)