An estimated 1 million bison on private ranches and farms in North America. (Marris 2009)
Bred for reintroduction program in Alaska (Alaska Wildlife Conservation Center 2018)
Bison and domestic cattle can interbreed, producing infertile offspring. (Grizmeck 1990)
Some 65 Plains Bison have been kept at the San Diego Zoo since the first two arrived in 1925. (Towne 1976)
14 bison from the San Diego Zoo were released in 1973 at the Marine Corps base Camp Pendelton in southern California (Towne 1976) and still roam free today.
