Gray Wolf

The forelegs of wolves are closer to each other than those of dogs, with the former's tracks being further apart. Their tails hang straight or in a slight curve toward the body when neutral, whereas dogs carry their tails in a slight curl. Wolf paws are generally larger than dog paws, though it is almost impossible to distinguish similarly sized wolf and dog prints with certainty, though most dogs tend to have rounder paw prints than wolves.
Physical description