The term 'Orioles and Cardinals' refers to two Major League Baseball teams. The Baltimore Orioles and the St. Louis Cardinals are both members of the American League and National League, respectively. The crossword solutions for this term are 'birds' (5 letters) and 'bigleaguers' (11 letters). This accurately describes the two teams as they are both birds, representing their respective cities, and they are both big leaguers, meaning they are part of the highest level of professional baseball in the United States.