About the Authors

Walter Jetz

To whom correspondence should be addressed. E-mail: wjetz@ucsd.edu

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

Cagan H Sekercioglu

Affiliation Center for Conservation Biology, Department of Biology, Stanford University, Stanford, California, United States of America

Katrin Böhning-Gaese

Affiliation Institut für Zoologie, Abteilung Ökologie, Johannes Gutenberg-Universität, Mainz Germany

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.