Wolverine mothers dig deep snow dens for their cubs that provide critical thermal insulation and protection. Climate-driven snowpack loss directly threatens cub survival and is a key welfare concern.
Wolverine cub welfare is directly and measurably affected by climate change through the mechanism of snowpack loss. Newborn kits depend entirely on the thermal insulation of deep snow tunnels for survival in the weeks after birth — without stable snow, dens collapse or melt too early, exposing kits to fatal cold or predation. Studies have documented that reproductive success in wolverine populations correlates strongly with snowpack depth in late spring. In poor snow years, many females produce no surviving young. This represents a climate-driven welfare harm to individual animals — kits born into inadequate dens suffer from cold exposure and starvation before dying. Unlike many wildlife welfare problems, this cause is entirely attributable to human activity through greenhouse gas emissions, and is preventable through climate action.