Voice - The cheerful, flute-like song of the male "Baltimore" Oriole is a loud whistle which resembles "sure-ly sure-ly sure-ly sure-ly-the-world-is-bright-and-gay". The song of the "Bullock's" Oriole is faster and more complex and includes more "chatters" and "rattles". It resembles "chuk chuky wheew wheew wheew". Calls include a dry "chatter" for both races, a clear "cleek" note for "Bullock's" Oriole and a one or two syllable whistle for the "Baltimore" Oriole.