By Manish Choudhary
Big elephants can get mad if they feel threatened.
These big reptiles with strong jaws can be very mean.
Small but tough, they'll fight anyone, even bigger animals.
A big, black buffalo in Africa can be super dangerous.
Found in Australia, their sting hurts a lot and can even kill.
Tough little predators that don't back down from a fight.
A big bird that kicks hard and is not friendly.
Lions in Africa can be aggressive, especially if they're protecting their turf or hunting for food.