a positive statement or declaration, often without support or reason: a mere assertion; an unwarranted assertion. 2. an act of asserting. Origin of assertion.
The Endangered Species Act has classified the grizzly bear as a threatened species in the continental United States. However in 2007 the bears were removed from the list at Yellowstone National Park. Other reserves where the bears reside include locations in Alaska, Montana, Idaho, Washington, and Wyoming.
However, by 1928 only seven grizzlies remained and by 1953 only one species remained globally. However, modern genetic testing reveals the grizzly to be a subspecies of the brown bear (Ursus arctos). Rausch found that North America has but one species of grizzly. Therefore, everywhere it is the brown bear; in North America, it is the grizzly, but these are all the same species, Ursus arctos.