One of my favorite ongoing projects is to comb the goldenrods for caterpillars and then, after I've found and photographed the new arrivals—or added the old-timers whose names I can still remember to my informal database—it's back home with the adolescents in hand... well, in the bug jars... to begin the process of combing through the pages of University of Connecticut entomology professor David Wagner's magnum opus Caterpillars of Eastern North America. Many IDs are tricky, but this one was easy. It's known as the Turbulent Phosphila, and while the adult moth is pretty plain, the caterpillars are standouts, with vivid striping and "two heads."  Of course, one is a fake designed to confuse potential predators and lure them away from the genuine brains of the insect. See if you can figure out which end is which.