Congress named the bison the “American National Mammal” in 2016. But if wild bison migrate outside the protection of Yellowstone National Park, they are managed less as an iconic symbol of the American spirit and more like a pest, largely because they allegedly infect domestic cattle with brucellosis. Produced by the Buffalo Field Campaign, Our National Mammal reports on the conflict over bison management in Montana. “People are too scared to let wild things be wild,” laments one activist.