An integrative framework for understanding the origin and evolution of avian migration


John H. Rappole, Smithsonian Conservation and Research Center, 1500 Remount Road, Front Royal, VA 22630, USA. E-mail: jrappole@crc.si.edu. Barbara Helm, Max-Planck Research Centre for Ornithology, D-82346 Andechs, Germany. E-mail: Barbara.Helm@t-online.de. Mario A. Ramos, Global Environment Facility, World Bank, 1818 H St., NW, Washington, D. C., USA, E-mail: mramos@worldbank.org

Ancillary