Zoo Animals

Zoo Bison Conservation and Welfare

American bison in zoos and conservation herds represent one of the great wildlife recovery stories with ongoing welfare considerations.

Key Facts

Bison populations fell from 60 million to fewer than 1,000 by 1889 before conservation efforts reversed the decline
Approximately 500,000 bison now exist in North America, mostly in private commercial herds
Wild-range behavior includes seasonal migration, wallowing, and complex herd social dynamics
Zoo bison require large grazing areas and social groups to express natural herd behaviors
Genetic diversity programs have been critical to preventing inbreeding in recovered populations

Welfare Considerations

Bison in zoo conservation programs occupy an important place in one of conservation's greatest success stories. Their welfare needs include substantial grazing space, appropriate herd social structure, and management that respects their powerful, unpredictable nature. Facilities that provide genuine prairie-scale grazing environments support far better welfare than those treating bison as exhibit animals in small paddocks.

What You Can Do

Visit national parks and wildlife refuges where wild bison roam rather than zoo exhibits where possible
Support organizations working on wild bison restoration to native prairie ecosystems
Learn about the cultural significance of bison to Indigenous peoples of North America
Advocate for wild bison restoration to additional public lands
Support efforts to reduce brucellosis transmission concerns that have historically limited bison range