A Pacific tree frog after I rescued it from my hot tub.

When I opened the lid of my hot tub one day four years ago to check the amount of chlorine and other chemicals in the water, a tree frog that had been hiding between the lid and the top of the tub took a flying leap into the caldron.

At 104 degrees, the water is hot enough to quickly kill a frog. I’ve seen it happen. This time, however, I had a sieve with me and was able to scoop the frog out in time to save it.

A Pacific tree frog climbs a bamboo shoot growing near the hot tub. Lynn and I are fond of the little guys even though frogs aren’t exactly people. But as the Greek philosopher Bion (c. 325 to c. 255 BC) observed: “Though boys throw stones at frogs in sport, the frogs do not die in sport, but in earnest.”

Tree frogs change their colors as they move between dry and damp places. This frog is sitting on a dry persimmon leaf on the deck beside the hot tub.

When I lifted the lid off the hot tub, I found these two fellows squeezed under it. Notice that they are starting to change colors.

Tree frogs hanging out around a hot tub and the people soaking in it can occasionally create unlikely juxtapositions. Twice in years past, lady friends obliged this photographer by posing with frogs that showed up dazed from immersion in the hot water.

The U.S. Postal Service also recognizes how alluring frogs can be and featured four varieties on its “forever stamps” a year ago. I wish I’d bought more.