1. Department of Biology University of Maryland College Park Maryland 20742 USA
2. Wildlife Biology Program Department of Ecosystem and Conservation Sciences W.A. Franke College of Forestry and Conservation University of Montana Missoula Montana 59812 USA
3. National Park Service Gates of the Arctic National Park and Preserve Arctic Inventory and Monitoring Network Fairbanks Alaska 99709 USA
4. Department of Environment and Natural Resources Government of the Northwest Territories Fort Smith Northwest Territories Canada
5. Department of Environment and Natural Resources Government of the Northwest Territories Yellowknife Northwest Territories Canada
6. Max Planck Institute of Animal Behavior Am Obstberg 1 Radolfzell 78315 Germany
7. Department of Civil, Environmental and Geodetic Engineering The Ohio State University Columbus Ohio 43210 USA
8. Department of Environment and Natural Resources Government of the Northwest Territories Inuvik Northwest Territories Canada
9. Circumarctic Rangifer Monitoring and Assessment Network (CARMA) Salt Spring Island British Columbia V8K 1V1 Canada
10. Fish and Wildlife Branch Environment Yukon, Yukon Government Dawson City Yukon Canada
11. Lamont‐Doherty Earth Observatory Columbia University Palisades New York 10964 USA