Listen to a humpback whale chorus off the coast of Maui —What’s more incredible than spotting a majestic, school bus–sized humpback whale? Hearing one sing, too. During their mating season in the warm waters off Maui (November to May), male humpbacks produce complex songs, made up of melodic patterns of moans, cries, clicks and whistles, that can last up to 30 minutes and be heard underwater hundreds of kilometres away. Bernie Krause, a soundscape ecologist who has recorded dozens of hours of whale songs around the Hawaiian island, describes them as otherworldly: “I was amazed at the range of the whales’ utterances, the form of the phrases and the urgency of their vocalizations,” he says. Krause has been travelling the planet to record and archive the sounds of the natural world since 1968.