American bison were reduced from tens of millions to fewer than 1,000 animals in the 19th century before conservation efforts began their recovery. Ongoing restoration programmes raise important questions about welfare, ecology, and the ethics of managed rewilding.
Wild bison restoration involves accepting the full range of natural welfare experiences — including predation, injury, harsh weather, and competition — in exchange for the freedom and ecological authenticity that defines wild life. Bison culled at park boundaries, hazing operations that drive bison back into Yellowstone, and brucellosis test-and-slaughter programmes all represent human-caused welfare harms imposed on animals that would otherwise live freely in a natural social structure. These harms occur because bison recovery has not been accompanied by adequate political resolution of the conflicts between bison presence and livestock interests. The welfare case for genuine bison restoration — removing the management interventions that cull, haze, and slaughter bison at jurisdictional boundaries — is inseparable from the political case for creating large protected landscapes where bison can live without encountering livestock interests. Tribal bison restoration adds a further dimension: the welfare of bison herds managed in accordance with Indigenous ecological knowledge and cultural practice, in landscapes where the human-bison relationship is one of respectful coexistence rather than conflict.