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    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)