See the world's most poisonous and dangerous spiders

However, in some more severe cases, their bites may cause necrosis around the bitten site. Fortunately, they only live in the southern United States.Fringed Ornamental Tarantula: This type of tarantula is more common near the tropics and in tropical regions. Most tarantulas do not have any poison, and they are considered quite calm - although, regardless of that, their bites are extremely painful.