Sound the Alarm

Run for your lives

Sound the Alarm, in Rainier-Wildlife; Landscape by John Christopher

On the foggy slopes of Mount Rainier in Washington State, a Hoary Marmot generates a high pitched yell to alert his family and scare away a coyote loitering around the marmot's nest. Similar to a supersonic dog whistle, the sound seemed to have the desired effect.

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