Caution should be taken when hunting these animals, as some predators in Far Cry 3 can kill you in seconds, and even more caution should be taken when you know other predators are nearby, as a group of animals could kill you very quickly.
On the other side, animals marked as aggressive, such as cassowaries, buffalo, boar, will often choose not to flee, but to attack.One should move quietly when hunting them. Most animals will get scared easily and will run away.