Wolverines are among North America's most wide-ranging carnivores, requiring vast territories that are increasingly bisected by roads. Road mortality is a growing threat to this vulnerable species.
Road mortality causes sudden traumatic death - one of the worst welfare outcomes for any individual animal. For wolverines specifically, each individual death has outsized conservation significance given how small total populations are. Beyond fatalities, roads create barrier effects that isolate subpopulations, reducing genetic diversity and long-term population viability. Animals attempting to cross roads may repeatedly face the stress of vehicle encounters even if they survive. Fragmented habitat also means wolverines must travel further to meet basic needs, increasing energy expenditure in an environment where caloric margins are already thin.