Mountains act as a huge echo chamber for elusive creatures—like snow leopards—who use the landscape to amplify their rarely heard love songs.

In one of the richest soundscapes, howler monkeys attempt to out-voice each other and sloths break their silence to search for mates.

The Okavango Delta is awash with sound. And locals—from pied kingfishers to hippos—tune in to life above and below the water to survive.