Select the track which most closely resembles the one you wish to identify.
How to Identify Tracks
Examine as many prints as you can find to determine which are "typical." Learn to recognize prints that overlay one another, which can give the impression of extra toes and exaggerated size.
Get as close to the print as possible so you don't miss any fine details.
When identifying a track, it's important to take note of the following points:
number of toes on each foot
size (if you are not carrying a ruler, measure against your finger or some other object that can be measured later)
arrangement and shape of pads
"trail" characteristics (the arrangement and spacing of the prints)
Keep in mind that many animals walk in such a way that their hind prints appear ahead of their fore prints.