The population of black bears in southern New York has grown and expanded its range over the past 20 years, which has led to increased encounters with people. Until recently, a detailed knowledge of bear populations in the state has been lacking.
DNA analysis has become commonplace and inexpensive. Millions of people have their DNA tested to learn about their origins and family connections. And the technology has spread to biological research in the form of Environmental DNA or eDNA, which is such a powerful tool that it is transforming the field of wildlife biology.