1. Africanized Honey Bees

Unlike the European bee, these are more aggressive and a lot faster. When disturbed, they tend to act quicker and in a larger number. The stinging is also more painful, and do it repeatedly.

2. Arizona Bark Scorpions

This one is the most dangerous scorpion found in the U.S. and it’s common in Arizona and California. If one gets stung by this scorpion you should seek medical help immediately, if not treated as fast as possible it can turn out deadly.

3. Red Harvest Ants

Red Harvest Ants are commonly found in the western part of the U.S., mostly in Texas. You may think that ants, in general, are harmless, however, these ants bite harder than anything else you’ve ever experienced.

4. Fire Ants as well

Unlike the previous ones, these are more common in the southern part of the U.S. They are ruthless and will gang up and kill the person that disturbs them.

5. Paper wasps

If you cross their territory, they will sting you and it can cause some severe allergic reactions.