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In North America's forests, a snowy game of hide-and-seek unfolds between foxes and voles. When seasons change, elk strike up a sonic rivalry.
Where land meets sea, rockhopper penguins, orca whales, and elephant seals find incredible ways to cut through the chaos.
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.