Many books, papers, and television shows have created an image of the African wild dog as the ultimate predator. According to these sources, the dogs' coordinated teamwork and their unusual endurance help them catch about eighty percent of their prey. A 2012 study tested that notion. Researchers fit a pack of wild dogs with special collars that recorded the dogs' positions and speeds. The data that the collars recorded allowed the researchers to learn what the dogs did when they weren't being observed. The results provided a surprising contrast with the dogs' fierce reputation. The dogs never used teamwork in their hunts; they chased their prey over short distances as opposed to long runs; and instead of eighty percent, they brought down only about sixteen percent of their prey.