The American green tree frog is a staple of summer nights in the U.S. South, where its groaning call echoes through countless swamps, forests, fields, and backyards. Yet even for many people who share ...

The first time I heard the chirping, at dusk, I thought it was an odd species of nocturnally active bird. The chirps were high-pitched, like the sound of a basketball player’s sneakers squeaking ...