Wolverines require remote, undisturbed snow den sites for successful reproduction, making them highly vulnerable to human disturbance from winter recreation and climate change.
Wolverines face welfare threats that are intertwined with their reproductive success. Den disturbance by snowmobiles or backcountry skiers causes mothers to abandon kits before they can thermoregulate independently, resulting in kit death. The solitary, wide-ranging nature of wolverines means that each individual failure to reproduce has significant population consequences. Climate-driven snowpack loss removes the physical substrate of successful denning, forcing wolverines into increasingly marginal habitats. These are not abstract population concerns — each kit that dies from cold after den abandonment or each female that fails to find adequate denning snow represents individual suffering with identifiable causes.