A mother wolverine and her kit play at the edge of a subalpine forest in the Pacific Northwest. Wolverines den, hunt and scavenge for carcasses in the snowpack on the sides of mountains. Perhaps 300 wolverines, or less, are left in all of the Lower 48. Climate change represents a major threat to habitat, but so, too, researchers say, is disturbance by recreationists in mountain environment. People displace wolverines from habitat they need to survive. Photo courtesy NPS/Cascades Carnivore Project