1. E. J. Bergman (https://orcid.org/0000-0003-4298-0732) ✉ (eric.bergman@state.co.us), Mammals Research Group, Colorado Parks andWildlife, Fort Collins, CO 80526, USA.
2. F. P. Hayes, P. M. Lukacs and C. J. Bishop, Wildlife Biology Program, Dept of Ecosystem and Conservation Sciences, W.A. Franke College of Forestry and Conservation, Univ. of Montana, Missoula, MT, USA.