1. Department of Biological Sciences, California Polytechnic State University, San Luis Obispo, CA 93407, USA
2. Coates Library, Trinity University, San Antonio, TX 78212, USA
3. Department of Biology, Wake Forest University, Winston-Salem, NC 27109, USA
4. Max Planck Institute for Ornithology, Seewiesen, 82319 Starnberg, Germany
5. Department of Biology, University of Konstanz, Konstanz 78464, Germany
6. Department of Biology, University of St. Thomas, St. Paul, MN 55105, USA
7. Department of Biology, Trinity University, San Antonio, TX 78212, USA
8. Department of Biology, University of Florida, Gainesville, FL 32608, USA
9. Department of Biology, University of Oklahoma, Norman, OK 73019, USA
10. Department of Global Health, University of South Florida, Tampa, FL 33620, USA
11. Cornell Lab of Ornithology, Ithaca, NY 14850, USA
12. Department of Biological Sciences, Virginia Tech, Blacksburg, VA 24061, USA
13. Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY 14853, USA
14. Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
15. Department of Biology, Hamilton College, Clinton, NY 13323, USA