In 2003, the tracks of one female lynx and her cub were spotted and followed for over . Fecal material and other evidence obtained were tested and confirmed to be those of a lynx. No one actually saw a lynx, however. Lynx have not been seen in Yellowstone since 1998, though DNA taken from hair samples showed that lynx were at least passing through the park. Other mammals that are seen less often are the mountain lion and wolverine. There are about 25 mountain lions in the park. People do not know how many wolverines there are.