White-tailed deer are among my favorite advisers. Being an important food source for the many cougars that inhabit the park, they seldom remain close to a noisy river or stream for longer than the time required to drink, and while they do, they pause often and look in different directions to compensate for the temporary inability to use sound for their security surveillance.

Gordon Hempton, John Grossmann, One Square Inch of Silence-…, loc. 107