Doug Tallamy is an author and a professor of Entomology and Wildlife Ecology at the University of Delaware. His research involves better understanding the many ways insects interact with plants and how such interactions determine the diversity of animal communities. In this episode of Nature Revisited, the central topic of discussion is oak trees. As Doug describes in his new book The Nature of Oaks, oak trees are a keystone species that sustain a complex and fascinating web of wildlife, and we must act to nurture and protect them.