Do you know if you're living near some of the world's most dangerous animals? You very well could be. Whether you're going for a swim, a hike, or even if you're just relaxing outside, you might encounter a deadly creature. When it comes to danger level, size really doesn't matter. Some of the smallest animals also are the deadliest. Take mosquitoes, for example. These tiny pests are well-known for their disease transmission, causing more than 750,000 deaths each year, compared with the larger, more aggressive hippo that causes around 500 deaths annually. Our list contains 15 creatures that are poisonous and vicious, huge and small — proving that danger isn't dependant on size. But don't let us scare you away from your next adventure; just be on your guard!