Preliminary data from studies indicate that wolf recovery will likely lead to greater biodiversity throughout the GYE. Wolves have preyed primarily on elk, and these carcasses have provided food to a wide variety of other animals, especially scavenging species. Wolves are increasingly preying on bison, especially in late winter. Grizzly bears have usurped wolf kills almost at will, contrary to predictions and observations from other areas where the two species occur. Wolf kills, then, provide an important resource for bears in low-food years. Aggression toward coyotes initially decreased the number of coyotes inside wolf territories, which may have benefited other smaller predators, rodents, and birds of prey.