March 29, 2012, "Fill-and-Build Manhattan." Guest Lecturer, CUNY School of Professional Studies, Nature of New York course.
Nov. 16, 2011, "Wildlife at the Water's Edge." Guest Speaker, New York University, Labowitz Theater, panel on "Wild NYC" with fellow guests Eric Sanderson, Rob Jett, and Bobby and Kathy Horvath.
Nov. 16, 2009: "The Changing Nature of Newtown Creek." Guest Speaker, "In the Wake of the Half Moon: Environmental Transformation of the New York Metropolitan Region 1609-2109," CUNY Sustainable Cities Institute, Hunter College.
Sept. 2, 2009. "Seven Ways of Looking at the Hudson." Guest Speaker, Arsenal Gallery/The Armory, sponsored by New York City Audubon.