Deer

Oh sure, they look like helpless, innocent icons of a simpler time and every kid grows up crying when Bambi loses his mother to heartless hunters, but deer can be surprisingly aggressive. Generally speaking, deer will run away when they sense danger, but during mating season males can attack humans the same way they would charge another buck and once babies are born, mothers will risk their life to save their offspring. Deer have even been known to fight back after they are wounded by hunters. In recent years, people have been attacked and killed by deer in California, New Hampshire, Maine and Georgia and even more people have been hospitalized by the animals.

Even when they aren't trying to hurt anyone, deer are still the most dangerous animal in the US based solely on the number of deaths they cause. Every year an average of 130 people die in car accidents from hitting deer. That's right, you're statistically way more likely to hit a deer with your car and die than you are to get fatal attacked by a shark or bear -and that's when the deer doesn't want to attack you.