Brown bears and black bears prey on young ones. Large pack of wolves prey on injured adults.
Siberian tigers and brown bears occasionally prey on asian black bears. Leopards are known to prey on asian black bear cubs.
Golden Eagles prey on calves. Wolverines, brown bears, polar bears and wolves all prey on grown caribou. Wolves are the commonest predator of caribou.
Sun bears are preyed on by saltwater crocodiles.
Yes. Brown bears, like Grizzly Bears especially, often kill and eat adult or young black bears whenever they meet each other.
Brown bears are omnivores and typically do not seek out humans as prey. However, in rare cases, brown bears may attack humans if they feel threatened or provoked. It is important to take precautions when in bear country to avoid potential encounters.
Lack of prey, and the simple fact it is extremely cold.
Otters are also prey to brown bears, sea lions, and bald eagles.
Brown bears and lions do not live in the same part of the world, so the question does not really come up. Both are predators, and predators do not usually hunt predators- they hunt prey. Prey do not have huge claws and teeth to defend themselves. Predators do. A brown bear would prefer to go eat a salmon.
Otters are also prey to brown bears, sea lions, and bald eagles.
In the wild, animals such as wolves, tigers, and other bears are known to prey on bears.
There are black bears, but no brown bears there.