Around midnight, it’s usually quiet in Forest Knolls, the only sounds coming from the house itself. Outside, you might hear the wind soughing in the trees and humming in Sutro Tower. But tonight, a bird chirped tentatively in the backyard. At first I thought it was just a songbird disturbed on its perch, or responding to the bright moon.
But it continued, growing louder and insistent. Opening a window to listen, I wondered if a raccoon had caught a bird. It sounded distressed. I could see nothing in the dark, my yard was in shadow.
I ran down to turn on the garden light. And then I saw it – not a bird at all, but a skunk, right up against the back fence in a corner. When I shone the flashlight on it, it emerged from the shrubbery. And then, out came another one. Mating season!
They stuck around for a while, but annoyed by my watching them, they left through a hole under the fence. There was mildly skunky smell. Love was in the air.
FOREST KNOLLS NEIGHBORHOOD 
I thought I was nuts! I live in Diamond Heights and hear the constant thrum and hum of Sutro Tower. Like a background of a refrigerator. It is not a neighbor with a loud stereo as I heard it at Tower Market too.