Weasels and foxes also benefited from the rebounding rodent population, and their numbers began to grow, too. Even pronghorn numbers were up. Though no predator in North America can run down a healthy adult pronghorn, coyotes routinely fed on helpless newborn calves, which had long depressed the park’s herds. Wolves, however, seldom take pronghorn calves, so their displacing of coyotes meant more antelope survived to adulthood.
