The voice is described as fluty and distinctive. These are mainly forest birds with large eyes, straight slim bills and fluty voices. Its call is a series of loud fluty notes, usually given only by the male. The mouth has a high cut-up (height to width ratio) to produce the fluty tone. The calls include fluty twin-notes repeated with short intervals. The usual call is a rapid series of three short fluty notes syllabilized as "teu-teu-teu". The display song of the male is a fluty "poor-me". The call itself consists of a loud fluty "oop-pu-pu-pu" followed immediately by a "krukru".