Female wolverines require persistent snowpack for denning and kit survival, with reproductive success directly tied to winter climate conditions that are deteriorating across much of their North American range.
Reproductive failure in wolverines due to snowpack loss or denning disturbance represents one of the most direct welfare harms from climate change and human disturbance documented in any species. Kits that cannot be protected in snowpack die from cold exposure within hours. Given wolverines' already low reproductive rates, each failed reproductive attempt represents years of population-level impact. Winter recreational management that establishes snowmobile exclusion zones in documented denning areas provides direct, immediate welfare protection.