The term 'Rocky Mountain Grazers' refers to a type of large mammal, the elk. Elks are members of the deer family and are native to North America. They are found in mountainous regions, particularly in the Rocky Mountains, where they graze on grasses, shrubs, and other vegetation. Elks are known for their impressive antlers, which can reach up to five feet in length. They are also known for their loud bugling calls, which can be heard for miles.