Concept Illustrated: Using Stone Rolls to Find Tracks
And yes, you are correct … That photo? A deer? No way!
The idea: Illustrate a small-ish stone rolled by a deer foot … Searching for disturbances of small stones is another way to find tracks when they aren’t obvious.
Soil conditions, and the way those affect soil response to a foot, are constantly changing. When tracks are created in some soil conditions it’s easy to find them, in other conditions not so much.