Skiers watch bison from the road, Lower Geyser Basin. Original public domain image from Flickr https://www.rawpixel.com/image/4039499/photo-image-background-people-natureFree Image from public domain licenseBison in Lower Geyser Basin in winter by Jacob W. Frank. Original public domain image from Flickr https://www.rawpixel.com/image/4038970/photo-image-tree-ocean-plantFree Image from public domain licenseBison on the move in Lower Geyser Basin by Jacob W. Frank. Original public domain image from Flickr https://www.rawpixel.com/image/4038564/photo-image-plant-nature-grassFree Image from public domain licenseBull bison walks in the snowy road near Midway Geyser Basin. Original public domain image from Flickr https://www.rawpixel.com/image/4038176/photo-image-dog-animalFree Image from public domain licenseA bison crosses the Firehole River at sunset by Jacob W. Frank. Original public domain image from Flickr https://www.rawpixel.com/image/4038513/photo-image-nature-mountain-waterFree Image from public domain licenseA bison grazes in Norris Geyser Basin by Jacob W. Frank. Original public domain image from Flickr https://www.rawpixel.com/image/4038188/photo-image-tree-plant-natureFree Image from public domain license