No animal on Earth is as aggressive, territorial and deadly as humans, but there are some pretty aggressive animals out there. They don't create country names or officially wage war, but that makes them much more dangerous. Stumbling through the wrong animal's territory at the wrong time is one of the worst things that can happen to any adventurer. Nothing will make your hike more grueling than accidentally stepping on a wasp's nest. You don't realize how fast 10 mph is until you're running away from a snake on sand.
For the most part, every living thing in the animal kingdom, us included, knows to respect each other's space. Animals don't attack just to attack, and as long as you respect their boundaries, you should be fine. The problem is, unless you're a zoologist or scientifically trained in recognizing animal behavior, you likely don't have a clue what an animal's boundary looks like. You probably violate boundaries every day. All those alley cats, birds, chipmunks, squirrels, ants, flies, raccoons, skunks, deer, rodents and whatever else you see on a daily basis have marked territories that you don't know are there, let alone care to respect. The good news is, those animals aren't going to do anything to you. You can encroach on their territory all you like. Rodents will be rodents and mosquitoes will be mosquitoes, but other than that, you're fine. These animals, however, are animals you don't want to get close to. Whether you know it or not, they're some of the most aggressive animals on Earth. Do you know which animals to stay away from in the wild?