As I write this, I can hear a cardinal trilling in the backyard. I don’t have to look out the open window to confirm the source of the sounds that come through it; I’ve come to recognize the songs and their singers. I know it’s the mourning dove whose cooing wakes me in the morning and the sparrow whose repetitive chirps complete the sunrise chorus. Watching birds perched on a branch or visiting a feeder imparts a certain connection to nature that little else does, and, for me at least, listening to their melodies alleviates stress. Birds are also the...