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 range of the grizzly bear once covered most of the western United States, Canada, and Mexico. Relentless human expansion and hunting has diminished the bears habitat to Alaska, western Canada, and a handful of northwest states.
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.