About the Authors
- Joseph W. Brown
- Museum of Zoology and Department of Ecology & Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, United States of America
- Ulf Sorhannus
- Department of Biology & Health Services, Edinboro University of Pennsylvania, Edinboro, Pennsylvania, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: US. Analyzed the data: JWB US. Wrote the paper: JWB US.