The ninetieth annual meeting of the Wilson Ornithological Society (WOS) was held in joint session with the Association of Field Ornithologists (AFO) from Thursday, 9 April, through Sunday, 12 April 2009 at the Hilton Pittsburgh in Pittsburgh, Pennsylvania at the invitation of the National Aviary and Powdermill Nature Reserve, Carnegie Museum of Natural History, in partnership with the Three Rivers Bird Club, Audubon Society of Western Pennsylvania, Duquesne University, University of Pennsylvania, Pennsylvania Game Commission, Western Pennsylvania Conservancy, and the American Birding Association. Todd Katzner, Director of Conservation and Research at the National Aviary, chaired the local committee, which also included Anthony Bledsoe, Jim Bonner, Tammy Colt, Jean Deo, Erin Estell, Mike Kuzemchak, Steven Latta, Andrew Mack, Brady Porter, Brian Shema, Poly Singh, Jack Solomon, Samara Trusso, and James Valimont. The Council met from 0916 to 1708 hrs on Thursday, 9 April, in the Brigade Room of the Hilton Pittsburgh. That evening there was an ‘‘ice-breaker’’ reception for the conferees and guests. The opening session on Friday convened in the Grand Ballroom at 0814 with welcoming remarks from Todd Katzner, WOS President James D. Rising, and AFO President David N. Bonter. After several items of information for the conferees, David Bonter concluded the opening ceremony by introducing the plenary speaker, Bruce Beehler, who delivered a wonderfully thought-provoking presentation, ‘‘The forgotten science—a role for natural history in the 21st Century.’’ The scientific program included 54 contributed papers and 62 contributed posters, which were organized into eight paper sessions, a poster session, and a symposium on remote and automated technologies for monitoring birds. In addition, WOS hosted the Margaret Morse Nice Lecture, presented by the 2009 Nice Medal recipient, Sidney A. Gauthreaux Jr., ‘‘Radar ornithology at different spatial scales.’’ The evening program on Friday included a reception at the National Aviary, which coincided with the poster session. The Three Rivers Bird Club hosted birding forays in the vicinity of the conference site each morning from Thursday through Sunday. In addition, longer trips were scheduled for Sunday to: (1) Powdermill Nature Reserve, the biological research station of Carnegie Museum of Natural History with a trip to Frank Lloyd Wright’s Fallingwater; (2) the Pittsburgh Zoo and view of downtown Pittsburgh from an amphibious tour vehicle; (3) the University of Pittsburgh campus, home of a breeding pair of Peregrine Falcons (Falco peregrinus), and a tour of the Carnegie Museum of Natural History; (4) the Pymatuning Laboratory of Ecology in northwestern Pennsylvania; and (5) Moraine State Park and Lake Arthur. The attendees enjoyed a social hour prior to the annual banquet, which was held in the Kings Garden Room of the Hilton Pittsburgh. The evening festivities included an enjoyable dinner, and afterwards WOS President Rising and AFO President Bonter joined those assembled in thanks to the many persons whose hard work had resulted in a successful conference. President Rising also thanked the three elected members of Council who had completed their terms of office, Carla Dove, Greg H. Farley, and Daniel Klem Jr., and welcomed the three newly elected members of Council, Mary Bomberger Brown, Mary Garvin, and Mark S. Woodrey, who will serve the 2009– 2012 term, and another newly elected member of Council, Mia R. Revels, who will serve the remainder of a vacated 2007–2010 term. The following WOS awards and commendations also were presented: