About the Authors

James F. Saracco

jsaracco@birdpop.org

Affiliation The Institute for Bird Populations, P.O. Box 1346, Point Reyes Station, CA, 94956–1346, United States of America

Paul Radley

Current address: School of Natural Sciences, Edith Cowan University, 270 Joondalup Drive, Joondalup WA, 6027, Australia

Affiliation Commonwealth of the Northern Mariana Islands, Division of Fish and Wildlife, Department of Lands and Natural Resources, P. O. Box 10007, Saipan, MP, 96950, United States of America

Peter Pyle

Affiliation The Institute for Bird Populations, P.O. Box 1346, Point Reyes Station, CA, 94956–1346, United States of America

Erin Rowan

Affiliation The Institute for Bird Populations, P.O. Box 1346, Point Reyes Station, CA, 94956–1346, United States of America

Ron Taylor

Affiliation The Institute for Bird Populations, P.O. Box 1346, Point Reyes Station, CA, 94956–1346, United States of America

Lauren Helton

Affiliation The Institute for Bird Populations, P.O. Box 1346, Point Reyes Station, CA, 94956–1346, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JFS PR PP. Performed the experiments: PR ER RT LH. Analyzed the data: JFS. Wrote the paper: JFS PR PP. contributed artwork: LH.