European and American bison reintroduction programmes are conservation successes, but welfare considerations during capture, translocation, and establishment are critical to animal welfare outcomes.
Reintroduction operations involve unavoidable welfare costs including capture stress, transport, and habitat novelty. Minimising these costs requires careful planning: pre-conditioning animals to capture procedures where possible, limiting transport duration, releasing animals in groups with existing social bonds, and monitoring post-release for signs of injury or distress. In the long term, successfully established bison herds in large semi-natural reserves show high positive welfare indicators including social play, reproductive success, and natural foraging behaviour across large areas.