Sadly, it was one of the black ones, which are a bit rare here. I hope it wasn't the babies' mother. You don't know which squirrels are the mothers, as they never have anything to do with the babies when outside of the nest.
On the brighter side, the babies have become much more approachable.
There are three browns and one gray, and all seem to be from the same litter. Three of them were down when I arrived:
I managed to get some great pictures of the cuties (click to enlarge):
Some children came by and were ecstatic watching the squirrels. Their father, who was on his cell phone, didn't seem to be paying much attention, but as soon as their mother arrived, she started telling the children to stay away from the squirrels as if they were some deadly enemy. Then she started lecturing me about feeding them. I wasn't supposed to be doing that.
Her children gathered around and formed a chorus: "Don't feed the squirrels!"
I explained: "I only feed them because they're hungry and need to be fed."
She replied haughtily: "Oh, they are well-fed, I assure you of that!"
"Oh, really?" I asked, "Fed by whom?"
That seemed to stump her. End of conversation. :)