As a bat swoops through the night sky, it chirps out high-frequency calls and listens for the echoing sound waves to navigate the dark forest. Those chirps may be above the hearing range of most animals, but not the greater wax moth, which can hear frequencies of up to 300 kilohertz — about 15 times greater than the upper range of human ears. Sensing the bat's call, the moth knows its predator is approaching, and it ducks out of the way just in time.
Both bats and greater wax moths are frequently cited as having some of the best ears in the world. But which animals really have the best hearing?
