The National Science Foundation has provided most financial support for our research on redstarts in both New Hampshire and Jamaica. We appreciate the continued support and permission of the Northern Research Station, U.S. Forest Service, to work in the Hubbard Brook Experimental Forest, New Hampshire. It is a pleasure to acknowledge the many people in Jamaica over the last 30 years who made our studies there possible and enjoyable, particularly Pam and James Williams (and their grown children Peter and Bella), Tony Clarke, Leo Douglas, Catherine Levy, Lisa Salmon, Yvette Strong, Robert and Ann Sutton, Peter Vogel, and Errol Ziadie. We thank the innumerable field assistants who have contributed to our studies of redstarts, and also our long-term colleague Frank Sturges. J. V. Remsen provided redstart stomachs from migratory individuals collected in Louisiana, and unpublished data on migratory behavior in that state. We thank Sandra Gaunt and the Borror Laboratory of Bioacoustics at Ohio State University for preparation of sonographs, Terry Sexson who helped with bibliographic services, and Jeff Price for his preparation of the distribution map based on BBS data. We thank Susan Hannon, Keith Hobson, Pam Hunt, Victoria Ingalls, Robert Lemon, Irby Lovette, Pete Marra, Chris Rimmer, Cynthia Staicer, and Marc-André Villard for unpublished abstracts, data, or manuscripts. Susan Hannon, Robert Lemon, Pete Marra, Brigitte Poulin, Cynthia Staicer, and Marc-André Villard provided constructive comments on various editions of the manuscript. Deborah Visco helped with the writing and bibliographic research of this revised version. Finally we thank Alan Poole, Keith Russell, Paul Rodewald, and Brooke Keeney for editorial assistance and patience throughout the writing and publishing of both the original and updated versions, and for help in writing the distribution section.