The article discusses the common shrub shrub sold at nearly every garden center in America that can kill most birds within an hour. However, this is only part of the story, as research by University of Delaware ecologist Douglas Tallamy reveals that 96% of North American terrestrial birds feed insects, especially moth and butterfly caterpillars, to their young. The right plants can also contribute to the entire food chain birds depend on. Non-native ornamentals often support only a fraction of the insect life that native species do. The article suggests that removing non-native or planting these plants can significantly enhance the appeal of a bird-friendly yard.