X is for Fox (Only if it is spelled backwards)
I know. Fox starts with 'F'. I just couldn't find a Yellowstone animal whose name started with 'X' so I had to cheat. Sorry about that!
Did You Know?
Some groups of Shoshone Indians, who adapted to a mountain existence, chose not to acquire the horse. These included the Sheep Eaters, or Tukudika, who used dogs to transport food, hides, and other provisions. The Sheep Eaters lived in many locations in Yellowstone.