Cervus Canadensis Xanthopygus is a scientific name that represents a subspecies of elk found in North America. Some of the synonyms for this name include American Elk, Rocky Mountain Elk, and Wapiti. This subspecies is known for its distinctive yellowish rump patch, which sets it apart from other elk subspecies. It inhabits the mountainous regions of western North America, including the Rocky Mountains, and is an important game animal and symbol of the region. The subspecies is also important to the ecology of the region, as it influences the vegetation and is an important prey species for predators such as wolves and bears.