Why did Chicago Bears get their name bears?

The Bears were formed in 1920 in Decatur, Illinois as a football club for A.E. Staley's starch manufacturing company. They spent the 1920 season as the Decatur Staley's but moved to Chicago in 1921 to capture a larger fan base and played as the Chicago Staleys. In 1922 Staley sold the team to George Halas and Dutch Sternaman and Halas renamed them the Chicago Bears.