An order of mammals composed of two living families: Leporidae (rabbits and hares) and Ochotonidae (pikas). Rabbits and hares have short tails and long ears, whereas pikas lack an external tail and are short-eared. Rabbits and hares occupy a wide variety of habitats and are nearly worldwide in distribution. Pikas are found only in the mountains of western North America, in Siberia, and in the Himalayan region.