Caragors are some of Mordor's fiercest hunters, they prowl in small packs, seeking everything from Orcs to Graugs to consume. They prefer to pounce on their enemies, then clamp down with a bite from their massive jaws. Caragors are also fast runners and adept climbers, capable of scaling sheer cliffs in search of prey. They can be ridden by Uruks and Talion, if the rider(Uruk) is killed, the Caragor will become wild, attacking its former rider's allies.
Note when fighting:
Caragors cannot be attacked with the sword from the front. You have to attack the caragor from the side or shoot it with arrows. The only way to effectively kill a caragor from the front is to execute it.