Of deer there are in North America perhaps eight species : the black-tailed deer of the Pacific coast ; the mule-deer, and the white-tailed deer, of the Upper Missouri region and westward; the common deer of the United States east of the Missouri ; the wapiti of the northern and northwestern portions of the United States; one or two species of reindeer ; and the moose of the northern portion of the continent. […] Next to the moose, the wapiti or American elk (Cervus Canadensis) is the largest deer in North America.