A few weeks ago, I flipped it over as I looked for a small skink to feed Zack the injured kingsnake. I never did find a skink, (and to be honest, I wasn't excited about feeding a a cute little skink to Zack).
I actually had Zack in my left hand when I flipped over the pond shell and spotted the mystery snake.
Zack was pretty calm, so I made a grab with my right hand while holding Zack and the pond shell in my left.
He had a long slender tail like a coachwhip, but was younger (smaller) than any coachwhip I had ever caught.
Young coachwhips that have graced my hands were less brown and more greyish.
He did hold his head up once like racers do, but again, he was patterned differently and was much younger than any racer I had encountered.
Like any good mystery, he stayed on my mind for some time afterwards ... and now ... he's on yours.