9. MOUSE SPIDER
Location: Australia and South America
Why It's Scary: These larger arachnids are known to deliver a bite that can cause serious symptoms.
Scary Spider News: A Oregon woman believes she found a mouse spider species native to Australia on her lawn. The daring American picked up the creature and said it was the size of a mouse. What's even creepier? No one is sure how the bugger got here from Australia. (KVAL-TV)