 Douglas Tallamy is my guest. He is professor in the Department of Entomology and Wildlife Ecology at the University of Delaware. We're discussing Nature's Best Hope, a new approach to conservation that starts in your yard. I'm Sasha Lilly, and this is Against the Grain on Pacifica Radio. Well, you were just talking about the vital importance of insects, and I wondered if you could tell us about the role that caterpillars in particular play, why they're so important.