As it says:
The behavior of modern animals does not differ all that much from some of the earliest species of dinosaur. Zoologists are on safer and safer ground when considering the behaviors of ancient animals if they can use modern examples for comparison.
Quote:Elephants, antelopes and horses are among modern animals who defecate in socially agreed hotspots - to mark territory and reduce the spread of parasites.
The behavior of modern animals does not differ all that much from some of the earliest species of dinosaur. Zoologists are on safer and safer ground when considering the behaviors of ancient animals if they can use modern examples for comparison.