About the Authors

Holly L. Lutz

hll47@cornell.edu

Affiliations Department of Ecology and Evolutionary Biology, College of Agricultural and Life Sciences, Cornell University, Ithaca, New York, United States of America, Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York, United States of America, Cornell Lab of Ornithology, Cornell University, Ithaca, New York, United States of America, Department of Zoology, Field Museum of Natural History, Chicago, Illinois, United States of America

Wesley M. Hochachka

Affiliation Cornell Lab of Ornithology, Cornell University, Ithaca, New York, United States of America

Joshua I. Engel

Affiliation Department of Zoology, Field Museum of Natural History, Chicago, Illinois, United States of America

Jeffrey A. Bell

Affiliation Department of Biology, University of North Dakota, Grand Forks, North Dakota, United States of America

Vasyl V. Tkach

Affiliation Department of Biology, University of North Dakota, Grand Forks, North Dakota, United States of America

John M. Bates

Affiliation Department of Zoology, Field Museum of Natural History, Chicago, Illinois, United States of America

Shannon J. Hackett

Affiliation Department of Zoology, Field Museum of Natural History, Chicago, Illinois, United States of America

Jason D. Weckstein

Affiliation Academy of Natural Sciences of Drexel University, Ornithology Department and Department of Biodiversity, Earth, and Environmental Sciences, Philadelphia, Pennsylvania, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HLL WMH JDW. Performed the experiments: HLL JAB. Analyzed the data: HLL WMH. Contributed reagents/materials/analysis tools: SJH VVT. Wrote the paper: HLL WMH JDW JAB VVT JMB JIE SJH. Conducted field work and sampling: HLL JDW JIE JMB VVT. Scored host traits for statistical analyses: JIE.