"Scat" or feces is left behind on trails.
The only clue left behind at the Roanoke settlement was the word "CROATOAN" carved into a tree. This mysterious disappearance of the settlers in 1590 is still unsolved.
A track in the sand is called a footprint or a trail. It is a mark left behind by a person or animal walking on the sand.
A cougar left behind the paw print in the snow.
fossil
Animal resin is the residue that is left after an animal leaves. Snails for example leave behind a type of resin.
dairy animal bed
It's called a spoor.
striations
The depressions left behind are called kettles. The raised areas are called moraines.
Extinct
Glacial drift.
silt