* Other grizzly bears: Grizzly bears sometimes kill other grizzly bears, particularly during mating season. Males may fight over access to females, and mothers may kill cubs that are not their own.
* Wolves: Wolves are the primary predators of grizzly bear cubs. Wolves typically hunt in packs, and they can take down even adult grizzly bears.
* Mountain lions: Mountain lions are also predators of grizzly bear cubs. Mountain lions typically hunt alone, and they usually target young or weak bears.
* Other animals: Grizzly bears can also be killed by other animals, such as moose, elk, and bison. These animals can sometimes kill grizzly bears in self-defense, or they may trample them to death.