I never knew that by August the birds are practically silent, only a twitter here and there. Now I notice. Last spring their noisiness taught me the difference between screamers and whistlers and cooers and O, the coloraturas. I have already mastered the subtlest pitches in our cat’s elegant Chinese. As the river turns muddier before my eyes, its sighs and little smacks grow louder. Like a spy, I pick up things indiscriminately: the long approach of a truck, car doors slammed in the dark, the night life of animals—shrieks and hisses, sex and plunder in the garage. Tonight the crickets spread static across the air, a continuous rope of sound extended to me, the perfect listener.