The master bath (& bedroom) is mostly unused, I was weighing myself when I thought I ought to run water thru the drains to fill the traps since the toilet bowl was low (in the winter I antifreeze them), to my surprise there was a frog under the seat, like pictured above, but not as colorful. By the way, this bathroom's decor/theme is cutsy frog.
I set him free, outside, where he may find his way back thru the sewer. SO, what next ??? Snakes!
PostScript: Urban tales tell of exotic snakes & alligators, but in this part of the country it's more likely to be snapping turtles.