Elk have several formidable natural predators, with the most significant being gray wolves, mountain lions (cougars), and bears. Gray wolves are the primary predators of elk in North America, often utilizing "pack hunting" strategies to exhaust and bring down adult elk, particularly during the winter when deep snow hinders the elk's ability to flee. Mountain lions are ambush predators that rely on stealth to catch elk of all ages, often targeting them in rugged or forested terrain. Both grizzly (brown) and black bears are known to prey on elk, though they are most successful at catching vulnerable "calves" during the spring calving season; however, a large grizzly is more than capable of taking down an adult elk. Coyotes also play a role, though they primarily target young calves or adults that have been weakened by disease, old age, or severe winter conditions. In some specific regions, such as the Russian Far East, Siberian tigers are also known to hunt elk. These predators play a crucial role in "culling" herds, ensuring that only the healthiest and strongest individuals survive to reproduce, which maintains the overall vitality of the elk population and prevents overgrazing of the habitat.