Migration
Coming in at No. 3 in our countdown is migration, one of the greatest adaptations in the animal kingdom and one that is used by a variety of different species. Nothing in nature is more awe-inspiring than the movement of a population of animals along the horizon as they migrate from one place to another. The reasons for migration are varied, but they usually have to do with finding food and a good place to mate. Some animals cover large parts of the globe with their migration routes. For example, the arctic tern makes an annual migration from its breeding grounds in the Arctic to its wintering grounds in Antarctica, covering a distance of 25,000 miles.