3. Siberian Chipmunk
You’re probably thinking, “How on Earth could these cute little chipmunks be dangerous?” We did, too. But Siberian chipmunks aren’t just adorable balls of fluff. These critters are often harboring ticks, and they can infect humans with Lyme disease, which can be lethal if left untreated.
Minden Pictures/Corbis, Mitsuaki Iwago