1. Grizzly Bear Native to Alaska and the western United States, the grizzly bear is a huge, strong predator that can become aggressive when it feels threatened.
2. American Alligator With its powerful jaws and potential for harm to people, the American alligator is a huge reptile mainly found in the southeast of the country.
3.Mountain Lion Known for its stealthiness and possible threat to humans, the mountain lion, sometimes known as the cougar, is found in western USA.
4. Eastern Diamondback Rattlesnake The biggest venomous snake in North America, It is native to the Southeast and is well-known for both its rattling sound and its potent venom.
5. Black Widow Spider Scattered over North America, the black widow spider is dangerous to humans due to its neurotoxic venom and striking red hourglass markings.
6. Brown Recluse Spider Found in the southern and central United States, It can inflict necrotic sores and severe health consequences with its venomous bite.
7. American Bison It is a symbol of the American West, is a strong herbivore that can charge quickly and present a threat if it is approached or disturbed.
8. Coyote The opportunistic predator coyote is found throughout North America. It feeds on small mammals but can sometimes be dangerous to people and pets.
9. Eastern Timber Rattlesnake The poisonous Eastern Timber Rattlesnake is found in eastern United States and is well-known for its rattling noise and possible threat to people.
10. American Crocodile it is a big reptile Living in southern Florida and can be dangerous to people, particularly where their habitats overlap.