Why did the buffalo become state animal?

You're asking about a specific state, but you haven't specified which one! The American bison (buffalo) is the state animal of several states:

* Wyoming: The American bison became the state animal of Wyoming in 1989. This choice reflects the historical significance of the bison to the state's culture and economy.

* Kansas: The American bison was designated the state animal of Kansas in 1925. This choice recognizes the animal's importance to the state's history and the vast herds that once roamed the plains.

* North Dakota: The American bison became the state animal of North Dakota in 1945. This choice acknowledges the animal's role in the state's history and culture, as well as its importance to the ecosystem.

If you can tell me which state you're interested in, I can provide more specific information about why the buffalo was chosen as the state animal.