About the Authors
- Robert C. Lacy
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* E-mail: rlacy@ix.netcom.com
Affiliation Chicago Zoological Society, Brookfield, Illinois, United States of America
- Glen Alaks
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Affiliation Chicago Zoological Society, Brookfield, Illinois, United States of America
- Allison Walsh
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† Deceased.
Affiliation Chicago Zoological Society, Brookfield, Illinois, United States of America
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: RCL GA AW. Performed the experiments: GA AW. Analyzed the data: RCL AW. Wrote the manuscript: RCL. Designed the data collection software: RCL AW.