Rabbits' cousins are two species of mammals, hares and pikas. Hares are larger than rabbits and have longer hind legs and ears. They are also faster runners and can reach speeds of up to 45 mph. Pikas are small, round mammals that look like a cross between a rabbit and a guinea pig. They live in rocky areas and feed on grasses and other vegetation. Both hares and pikas are found in many parts of the world, including North America, Europe, and Asia.