Sound has shaped the bodies of many beasts. Noise tapped away at the bullfrog until his ears became bigger than his eyes. Now he hears so well that at the slightest sound of danger he quickly plops to safety under a sunken leaf. The rabbit has long ears to hear the quiet “whoosh” of the owl’s wings, while the grasshopper’s ears are on the base of his abdomen, the lowest point of his body, where he can detect the tread of a crow’s foot or the stealthy approach of a shrew.