The animal above looks to be nothing more than a slightly fabulous emu/turkey hybrid. Peculiar and hilarious, yes. Dangerous? No. What may not be immediately apparent is the monstrous 5-inch long, razor sharp middle toe that all cassowaries wield. Combine that with their powerful legs and territorial attitude, and suddenly you have a natural killer. These animals' toe daggers have been proven to fatally sever human veins and arteries.

A general rule of thumb about nature seems to be that the more colorful something is, the more it wants to see you suffer. The mantis shrimp is no exception. Thankfully, because of their fairly small size, they can only really hurt humans via deep gashes to the skin. Were they any bigger than a few inches however, we could have a serious problem. The strike created by the snapping motion of these animal's claws is so powerful that the surrounding temperature can reach surface of the sun levels. They've also been known to break and shatter improperly reinforced aquariums just by striking the walls. They also have some of the most advanced eyes in the animal kingdom, so don't plan on running from one for too long when it backs you into a corner.