Bison are playing a larger role in the sustenance of park wolves compared to past years as Yellowstone National Park’s bison herd has swelled and elk numbers have declined, according to the ...

Wyoming’s Yellowstone bison look miserable when caked in snow and frost, but their thick coats, fat reserves and efficient digestion keep them warm ...

Gray wolves were once plentiful in Colorado. As settlers moved west and hunted the gray wolves’ natural prey, such as bison ...