So.... Back up to the roof I went.

I first gave them a quick inspection, since it's kind of a far drop and they had to have landed on these rocks...

Both of their wings and legs seemed to be moving just fine, and there were no other obvious signs of injury. They were both clearly hungry tho. As soon as I got close to scoop them up, they opened up their beaks and stretched their necks out towards me.

Not long after returning them to the nest, I saw what I assume to be momma flying out. She was some type of sparrow - we have several types common here. I'd hazard a guess (after perusing thru my state's wildlife website) that they are either Brewer's Sparrows or House Sparrows