Javelinas move at dusk. They are not pigs but collared peccaries, smaller and grey-haired with a pale band across the shoulder. A herd, called a squadron, comes through a wash in the last hour of light, nosing prickly pear pads and mesquite pods, the young ones close behind the adults. Tucson and the Sonoran foothills are where most of Arizona meets them — in alleys, in backyards, along the trail at Sabino Canyon. The smell is musky and unmistakable, and the herd is gone before the dark settles. — from the studio