By Manish Choudhary
Big bears in the Rockies that get aggressive if they feel threatened.
Huge reptiles in the South that can attack if you bother them.
Wild cats out West that might attack if they think you're a threat.
Snakes in the desert that bite and can make you very sick.
Small, black spiders with venom that's dangerous to people.
Small, brown spiders that can make you very sick if they bite.
Sharks that can be aggressive and are found in both oceans and rivers.
Snakes in the East that bite and can make you feel really bad.
Big, wild animals in places like Yellowstone that can hurt you if you bother them.