About the Authors

William B. Monahan

wmonahan@audubon.org

Affiliation Audubon California, Emeryville, California, United States of America

Competing Interests

The author has declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: WBM. Performed the experiments: WBM. Analyzed the data: WBM. Contributed reagents/materials/analysis tools: WBM. Wrote the paper: WBM.