Late 1800s bison almost became extinct. They were saved by the American Bison Society. Often called buffalo by early scientists who thought they were related to the Africa/Asian water buffaloes. French explorers also called the animals "les boeff" - the cattle.
June-September (one bull forms a temporary "tending bond" with one cow at a time).
April -June (reddish, brown fur, no conspicuous hump).
At one time bison roamed North America from Alaska to northern Mexico, western California to western New York.