The plant shown to the left - Nandina domestica (also known as Heavenly Bamboo or Sacred Bamboo) is killing songbirds across North America. If you have one or see one with berries, cut off the berries and dispose of them. North American songbirds mistake the berries for a food source. The berry seeds contain cyanide. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3005831/