This video segment from Nature: "Cold Warriors: Wolves and Buffalo" provides a glimpse into the world of wolves and buffalo in Wood Buffalo National Park in Northern Canada during winter. The video presents information about the structure of a wolf pack and the need for the wolves to hunt buffalo for survival. The video points out that, although buffalo can weigh more than a ton and be 20 times larger than wolves, they remain wolves' main prey. The segment also highlights the ways in which the bodies of buffalo are well-suited for cold weather and snow.