I finally saw a Sharp-tailed snake in the wild. It happened while visiting friends up the peninsula. Unfortunately, some other animal had seen it first, eaten it, and regurgitated it. There was no head or tail in what remained of the little critter, but my friend who'd discovered it had seen a more complete specimen (also dead) recently, and after looking at pictures, confirmed that it was indeed a Sharp-tailed snake.

Maybe next time I'll actually see a whole one. Perhaps it will even be alive.