You could have held the tight little nest in your cupped hands. The mother bird had chosen a potted cedar on our back deck for safety. We’d been out of town for a month when I discovered the bowl of fine twigs with four tiny eggs in the bottom close to the cedar’s trunk. Almost simultaneously, I understood why a group of crows is called a murder. Dozens of them were lurking in the trees behind me, as intent on living up to their collective name as I was in keeping them at bay. War was in the air.