About the Authors

Brenna A. McLeod

bmysticetus@gmail.com

Affiliations Biology Department, Saint Mary's University, Halifax, Nova Scotia, Canada, Nova Scotia Museum of Natural History, Halifax, Nova Scotia, Canada

Timothy R. Frasier

Affiliation Biology Department, Saint Mary's University, Halifax, Nova Scotia, Canada

Zoe Lucas

Affiliations Nova Scotia Museum of Natural History, Halifax, Nova Scotia, Canada, The Friends of the Green Horse Society, Halifax, Nova Scotia, Canada

Competing Interests

Regarding any competing interests due to funding from ExxonMobil, the authors confirm that this does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

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