Birdology: Adventures with a Pack of Hens, a Peck of Pigeons, Cantankerous Crows, Fierce Falcons, Hip Hop Parrots, Baby Hummingbirds, and One Murderously Big Living Dinosaur

by Sy Montgomery

Such low frequencies can travel over long distances; the sound is not dampened by the thick understory of wet leaves, as are high frequencies. This is why elephants and whales also use infrasound to communicate with one another when they are far apart.