The tracking technique is used to identify animal species just by analyzing their footprint! For years man has evolved his tracking technique as it was used for food, today it is used to study mammals!
With my friend Sibira I learned about the animal tracking technique, he always recommended me to follow a pattern of tracks, study the ecology of the site before working as detectives and always carry references in hand! here we can see a footprint of a (Hydrochoerus hydrochaeris)
As we can see, the footprint that we get is exactly similar to that of the pattern of our reference and seeing its pattern we can infer that they are from the previous legs