Wolverines face an existential climate crisis as the persistent snow cover they require for denning disappears across their range.
Wolverine climate welfare is a slow-motion crisis that is difficult to observe at the individual level but devastating at the population level. Individual females experiencing reproductive failure from early snowmelt invest energetically in denning that produces no surviving young — a welfare cost repeated across the population. The fragmented, small population of wolverines in the contiguous US faces compounding risks from climate change, road mortality, and trapping that together create serious extinction risk. Protecting wolverines requires both immediate conservation actions — federal listing, trapping restrictions, connectivity infrastructure — and the longer-term climate mitigation that preserves snow-dependent mountain ecosystems.