About the Authors

Scott Wilson

scottd.wilson@ec.gc.ca

Current address: Canadian Wildlife Service, Environment Canada, Saskatoon, Canada

Affiliation Migratory Bird Center, Smithsonian Conservation Biology Institute, National Zoological Park, Washington DC, United States of America

Peter P. Marra

Affiliation Migratory Bird Center, Smithsonian Conservation Biology Institute, National Zoological Park, Washington DC, United States of America

T. Scott Sillett

Affiliation Migratory Bird Center, Smithsonian Conservation Biology Institute, National Zoological Park, Washington DC, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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