The other types of indirect evidence are collectively called trace fossils. Trace fossils are not actual parts of an organism. Instead, they are some evidence of the organism’s behavior. There are three main types of trace fossils. Tracks and trails are produced by an organism walking, crawling, foraging, or resting. For example, dinosaur tracks provide information about how large the dinosaur was; how fast it walked; and whether it walked alone or in a group. Burrows and borings are the tunnels or burrows left by organism digging into the ground, either on land or underwater. This may indicate whether the animal was feeding, dwelling, or just foraging. Finally, coprolites are fossilized animal excrements. They give some indication of the structure of the animal’s gut, and sometimes provide clues to its diet. 

Tyrannosaurus rex tracks