Members of the "Blue-crowned Motmot" complex can be divided into two vocal groups, those that give songs consist of a single note, and those whose song contains two notes. The Amazonian Motmot is a member of the double-noted group. The song is transcribed as "a fast, hollow hooo-do" (Ridgely and Greenfield 2001b), and as "a bubbling whOOP-oo," in which the first note rises (Lane, in Schulenberg et al. 2007). When duetting, a second individual responds with a "slower whoop whoop or single whoop?;" duets also may include a "rolling series of hoots" (Lane, in Schulenberg et al. 2007).
Another vocalization is "a gruff kak," which sometimes is repeated rapidly in a "jumbled, excited series" (Lane, in Schulenberg et al. 2007).