Despite common belief, grizzly bears aren't one single species. Instead, they are any North American subspecies of brown bear, including the mainland and peninsular grizzly, as well as the kodiak bear. In fact, scientists often refer grizzlies as north American brown bears. History: Grizzly bears are notorious for being more aggressive than other bear species, but this is largely in part due to how fiercely grizzly bear mothers defend their cubs. Young grizzly bears will stay with their mothers for up to 3 years, however nearly half of all grizzly bear cubs don't live past their first year. Scientific name: ursus arctos Characteristics: known for their heightened aggression relative to other bear species, our figurine allows you to safely study all of the physical features of a grizzly bear cub in the palm of your hand. Size: 4.7 inches long and 1.95 inches tall, our grizzly bear cub toy statuette is a bit smaller than a soda can on its side.