Most of the world's top predators are strict loners, preferring to rely on their own individual prowess to bring down prey. But gray wolves run in a pack for a reason -- their coordinated efforts make them one of the most successful (and deadly) animals on this list. A typical wolf attack begins with members of the pack working together to encourage their victim to run. Not only is a lone animal easier to bring down than one that is in a herd, but a running animal poses less of a threat than one that is poised to fight. Then, the alpha male takes over to lead the chase, with his alpha female close behind. Once their victim stumbles and falls to the ground, the pack surrounds the animal and goes in for the kill.