Pronghorn are North America's fastest land animal and undertake one of the continent's longest remaining land migrations, facing significant infrastructure barriers.
Pronghorn welfare is most acutely threatened during migration. Fences that block movement force animals to search for passage along fence lines, sometimes for miles, burning critical energy reserves before winter. Animals that cannot complete migration face starvation on exhausted winter range. Vehicle collisions at road crossings cause injury and mortality. Climate change is altering the timing of green-up on summer ranges, potentially creating mismatches with migration timing. Each animal that fails to complete migration represents a welfare failure — exhaustion, injury, and death from barriers that humans have placed in evolutionary movement corridors.