At my last house I had a very small yard but it was well treed and there were 3 squirrels that were absolutely fearless... if I didn't set their food out in the morning they'd hang off the screen patio door and bitch at me
They'd take nuts from our hands and eat them there inches from our faces...(we'd lay down on the floor inside the house and they'd sit just outside the door).
I miss them and all of the birds dearly.