I believe this is a Carpenter Ant - genus Camponotus. It was HUGE! There were other large ones but this is the biggest one I saw. I wanted better pics so I captured it. It isn't dead, just cold. It soon came around and I turned it loose back in the woods.

However, there is something puzzling me. On the info page for Camponotus it says that Carpenter ants "build galleries in wood" and that they "do not eat wood, only nest in it". But I always find these in a hole in the ground underneath rocks, not in wood. And, it's not that they don't have access to wood because I find them in the woods (no pun intended) with many trees and many fallen trees and limbs on the ground. So if they commonly nest in wood why are they nesting in the ground under rocks? Unless, of course, this isn't Camponotus.

Please help with ID.