The Grizzly bear, scientifically known as Ursus arctos horribilis Threatened in the mountain prairie region, which consist of Utah, Colorado, Nebraska, Montana, North Dakota, South Dakota, Kansas and Wyoming. The grizzly is scientifically classified by the following kingdom: Animalia, Phylum: Chordata, Class: Mammalia, Order: Carnivora, Family: Ursidae, Genus: Ursus, Species: Ursus arctos horribilis. Surprisingly the polar bear is the closet living relative to the grizzly bear. Cross breeding happened