Day in the life. A false-color spectrogram made from a recording in the Australian bushland highlights the daily variation in the soundscape. Colors indicate values drawn from three acoustic indices, each sensitive to different types of sound. The chirps of crickets (yellow) dominate between dusk and dawn. As the sun rises, a bird call chorus (green) fills the air. Rainstorms strike in the afternoon; the black, low-frequency marks at the bottom of the image are produced by waterdrops hitting the recorder. Credit: Courtesy of Michael Towsey

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Dawn Chorus (04:57)
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Rainstorm (15:43)
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Cicadas (17:56)