A red fox prowls for voles, hidden beneath the snow, in Yellowstone National Park in the western U.S. state of Wyoming.… Free Image from public domain license 
Mule deer gather on a snowy hillside in Sweetwater County, Wyoming. Original image from Carol M. Highsmith’s America… Free Image from public domain license 
Trees get a white winter glaze in Yellowstone National Park. Original image from Carol M. Highsmith’s America, Library… Free Image from public domain license 
Copper Mountain Ski Resort, near the town of Frisco in Summit County, Colorado - Original image from Carol M.… Free Image from public domain license 
Iceberg in North Star Bay, Greenland. Original from NASA. Digitally enhanced by rawpixel. Free Image from public domain license 
