What tracks lead to the important food source in the book hatchet?

In the book "Hatchet" by Gary Paulsen, Brian follows animal tracks to a food source when he observes that animals were frequently present near a particular type of plant. He also learns to find food by observing the behavior of wildlife and identifying what they are eating. Over time, Brian becomes more skilled at foraging for berries, fish, and other edible items in the wilderness.