If you think humans are the only animals that are lazy, just wait till you see the biggest freeloaders in the natural world. We're counting down the top 10 most extreme layabouts of the animal kingdom as we search to find the laziest creature on earth. From a fox that follows a bear for an easy meal to an unwanted guest in a moth's ear, discover that all kinds of animals can hitch a ride when freeloaders are taken to the Most Extreme.