What are the needs of an urban bird? What can be done to increase the diversity of avian and other species living in the city? The highly managed nature of a city landscape provides biologists with some unique opportunities to understand both the role of humans in altering patterns of biological diversity and the role of behavior in limiting animal distributions. Join the Arnold Arboretum on Monday, September 22, from 7 – 8:30 in the Hunnewell Building for a lecture by Dr. Paige Warren, Associate Professor, Department of Environmental Conservation at the University of Massachusetts, Amherst. A guiding principle for Paige Warren’s research is that the typical indices of urbanization, such as human population density, describe only a portion of the habitat structure that is important for wildlife. Paige Warren has recently analyzed 150 years of documented changes in the bird communities of Cambridge and examined a variety of Boston’s green spaces to determine ways to improve and increase habitat for year-round as well as migratory birds and other city-dwelling animals. She will speak about her research, done locally and around the country, to understand processes generating and maintaining biological diversity in a world that is becoming increasingly dominated by humans. Fee $5 Arboretum member, $10 nonmember. Register on line at https://my.arboretum.harvard.edu/Info.aspx?EventID=1.