What's in the Hole?

Andy is obsessed with this hole in the ground out back! The hole, which I'm pretty sure is the entrance/exit to a groundhog burrow, is at the bottom of a retaining wall. Anytime we walk by the hole the boy insists on stopping and staring into it. He just stands there gazing at the hole - as if a nice plump groundhog will pop out any minute and jump into his mouth. Silly pup.
Did you know groundhogs and woodchucks are the same thing? They're also called
whistle-pigs (best name ever!) and land-beavers (also a pretty great name!).