Jaguars and humans have a lot in common in the places where jaguars live. They are both great hunters, and like to eat large forest prey like deer and peccary. As the human population grows, so does the demand for these prey. In many places, jaguars are finding fewer and fewer prey to eat because their prey are being overhunted by humans. When this happens, they either starve, or try to find other prey. Often these other prey turn out to be people's livestock.