About the Authors
- P. Dee Boersma
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* E-mail: boersma@u.washington.edu.
Affiliations Department of Biology, University of Washington, Seattle, Washington, United States of America, Wildlife Conservation Society, Bronx, New York, United States of America
- Ginger A. Rebstock
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Affiliations Department of Biology, University of Washington, Seattle, Washington, United States of America, Wildlife Conservation Society, Bronx, New York, United States of America
Competing Interests
The authors received donations of field equipment from two commercial sources (Trimble and Canon), but neither company (nor any of our funders) has any claims or restrictions on the data or results. Therefore, this does not alter the authors′ adherence to all the PLOS ONE policies on sharing data and materials.
Author Contributions
Conceived and designed the experiments: PDB. Performed the experiments: PDB GAR. Analyzed the data: GAR. Wrote the paper: PDB GAR.