1. Macaulay Library Cornell Lab of Ornithology 159 Sapsucker Woods Rd Ithaca NY 14850 USA
2. Migratory Bird Center Center for Conservation Genomics Smithsonian Conservation Biology Institute National Zoological Park MRC 5503 Washington DC 20013 USA
3. Fuller Evolutionary Biology Program Cornell Lab of Ornithology 159 Sapsucker Woods Rd Ithaca NY 14850 USA
4. Department of Ecology and Evolutionary Biology University of Colorado at Boulder 1900 Pleasant Street 334 UCB Boulder CO 80309 USA
5. Department of Ecology and Evolutionary Biology Cornell University E145 Corson Hall 215 Tower Road Ithaca NY 14853 USA