There Was No Rock There!?

Here is yet another story of another critter that 'ventured into our yard. Let's see, we have already had the poor petrified frog, the red-tailed hawk, snakes, bats, squirrels, and any number of birds. Not to mention all the neighborhood kitties, which is what lead us to discover the most recent 'new kid on the block'.
Mike and I were pooped from running around here and there. So we were veggin' in the living room, when he noticed a cat in the yard. I jumped up to take a peek. Hadn't seen that cat before. I watched her as she went up to what looked like a rock in the middle of our front yard. She sniffed and quickly jerked back her head, only to sniff again and start to leave the rock alone. "There was no rock there?!" I exclaimed. "That has to be a turtle...how did that get there?" We both zipped out the door to get a better look. And sure enough, we had a turtle in the yard, I haven't a clue where it wondered from. Looked like someone had been gnawing on the poor little thing. We discovered later that it was a female eastern box turtle. What really got us scratching our heads, was that she seemed to have a 'hinge' on the underside of her shell. One minute you saw her legs and head, the next she was in and sealed up like Fort Knox. Pretty impressive, never saw that before. Thank goodness she had the smarts to book it outta here before we mowed the lawn the next day.

Peek-a-boo.

The "hinge":