Wolverines depend on persistent spring snowpack for denning — as climate change erodes this resource, reproductive failure and population collapse threaten the species.
Climate change is creating a slow-motion welfare emergency for wolverines. Female wolverines that construct dens only to have snowpack melt prematurely lose entire litters — the kits die of exposure, a welfare harm that is repeated annually as conditions worsen. Adults that shift to higher elevations face more restricted territorial options, increased competition, and reduced prey availability. Range contraction creates population fragmentation, isolating groups and increasing inbreeding with associated immune and reproductive consequences. Unlike acute threats that can be mitigated by direct intervention, climate-driven habitat loss operates at a scale where even intensive management cannot substitute for the structural changes needed to stabilize the snowpack wolverines depend on.