Wolverines depend on persistent spring snowpack to cache food and raise young, making them among the most climate-vulnerable large mammals in North America.
Wolverines face a welfare crisis driven by forces entirely beyond their behavioral adaptation capacity. A warming climate systematically eliminates the snowpack conditions they require for successful reproduction. Females denning in areas of inadequate snowpack face kit mortality from temperature exposure and predation. The cumulative effect is population decline across the southern range. Unlike many conservation challenges, wolverine vulnerability cannot be addressed through habitat protection alone — it requires global climate action. Individual wolverines also face welfare harms from legal trapping in states where seasons remain open, and from human-caused mortality through vehicle collisions and hunting. Climate change represents the largest diffuse welfare threat to cold-adapted wildlife species globally.