http://www.defenders.org/bison/basic-facts 30 million Defenders.org Defenders of Wildlife Bison 30 million Basic Facts about Bison: Defenders of Wildlife now be found 30 million about 5,000 roam free http://www.defenders.org/bison/basic-facts Defenders of Wildlife, Bison Facts 30 million 30 million 5,000 un-fenced and healthy Defenders of Wildife bison Defenders of Wildlife, Basic Facts About Bison 30 million bison basic facts Defenders of Wildlife feature on bison Defenders of Wildlife Bison oxarna Defenders of Wildlife Defenders of Wildlife http://www.defenders.org/bison/basic-facts https://defenders.org/bison/basic-facts Bison oxarna http://www.defenders.org/bison/basic-facts Bison Today, about 500,000 bison live Bison Facts – Defenders.org 30 million Defenders.org Defenders of Wildlife fewer than 5,000 bison roam free2 20 to 30 million bison just over 1,000 bison 30 million