Tracking refers to the art and science of detecting, interpreting, following, and preserving the evidence of the presence or passage of any animal or thing. Virtually anything can be tracked via the physical evidence its presence or passage leaves behind; animals, humans, vehicles, weather, etc. By the same token, it is virtually imposable to move across any natural terrain or ground cover, and any man-made "ground covers" as well, without leaving physical evidence. Trackers are trained to detect this evidence. Mantracking refers specifically to the tracking of human beings and, by extension, their devices, such as vehicles. Though the basic skills of detecting, interpreting, following and preserving evidence are the same whether one is tracking a man or an animal, the fact that humans are psychologically complex beings gives mantracking its own additional set of skills and "rules of the game." 

-Owen Couch