Crabtree and Sheldon have been documenting the social, behavioral, and dietary changes among coyotes since the reintroduction. Their findings have helped explain how the coyote population, in the face of unrelenting persecution, has proven so extraordinarily resilient. During the past four years the Yellowstone wolves have reduced the coyote population by about 30 percent. The coyotes have had to rearrange their territorial boundaries, alter their hunting habits, and cope with the continual disruption of their pack structures. Still, the animals are not going to be wiped out in the area.
Humans are merely another, less effective predator.
Bears, like wolves, prey on coyotes and evolved as top animals in the food chain. They don't show a lot of inherent fear. As a result, bears and wolves did not develop the survival skills they needed to thrive. These species are now endangered primarily because they are so easy to kill. Coyotes, on the other hand, have an uncanny ability to adapt to almost any situation.