Illinois State Redbird Centennial Tee100 years ago, Illinois State changed mascots from the "Fighting Teachers" to something that matched their cardinal and white colors. They initially chose the cardinal bird, but to avoid confusion with the St. Louis Cardinals, went by the Redbirds instead. Celebrate 100 years of the Redbird with this commemorative Reggie Redbird illustration! Products are mocked up on a size S. Graphics may appear smaller on larger sizes.