One of the building blocks of ecological theory is that every organism must have its own niche. In order to survive, an organism is likely to have at least one skill that it can perform better than any other creature, or will become perfectly suited to a particular way of life. The result of this is that our hypothetical creature will avoid outright competition for resources with other species. With this in mind, we’ll take a look at some animals whose ability to use unusual parts of their body with great speed gives them an edge. Think of it as a mostly alternative list of the fastest animals – and there won’t be a cheetah in sight.