About the Authors

Walter Jetz
Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America

Cagan H Sekercioglu
Center for Conservation Biology, Department of Biology, Stanford University, Stanford, California, United States of America

Katrin Böhning-Gaese
Institut für Zoologie, Abteilung Ökologie, Johannes Gutenberg-Universität, Mainz Germany

Corresponding Author

wjetz@ucsd.edu

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

WJ conceived and designed the experiments. WJ analyzed the data. WJ, CHS, and KBG contributed reagents/materials/analysis tools. WJ, CHS, and KBG wrote the paper.