Wild Bison Restoration and Welfare

American bison were nearly driven to extinction but conservation efforts have restored populations. Ongoing welfare challenges include genetic management and land access.

Key Facts

Bison once numbered 30-60 million in North America; hunting reduced them to fewer than 1,000 by 1889
Yellowstone National Park maintains the only continuously wild bison herd in the US — about 5,000 animals
Most bison outside Yellowstone are commercially managed, not truly wild
Many conservation herds have cattle genetics introgressed historically — pure genetic lineages are rare
Bison require large ranges to follow seasonal forage — confinement reduces welfare significantly
The InterTribal Buffalo Council manages restoration programs across dozens of tribal nations

Welfare Considerations

Restored bison populations face welfare challenges from confinement — bison are migratory grazers that naturally travel hundreds of miles seasonally. Fenced populations on small reserves have higher parasite burdens, overgrazing-related stress, and reduced behavioral freedom. Yellowstone bison face culling when they leave the park boundary due to brucellosis concerns. Hazing and slaughter of animals exercising natural migratory behavior represents a significant welfare harm. Tribal buffalo restoration programs that provide larger land areas offer better welfare outcomes.

What You Can Do

Support tribal bison restoration programs through the InterTribal Buffalo Council
Advocate for expanded protected land access for Yellowstone bison migration
Support science-based brucellosis management that reduces reliance on lethal culling
Visit public lands where bison roam freely to build support for continued restoration