Peter Kareiva, Senior Scientist with the Nature Conservancy and Shahid Naeem, Professor of Ecology at Columbia University discuss the Endangered Species act. John Kostyack, National Wildlife Federation, Michael Mittelholzer, National Association of Home Builders, and Dennis Murphy, Professor of Biology at the University of Nevada-Reno comment on the presentations. These presentations were part of the major conference on The Endangered Species Act at Thirty: Lessons and Prospects presented by the Donald Bren School of Environmental Science and Management at UC Santa Barbara in Nov. of 2003. (#8681)