Vocalizations
Tepui Swift often is not particularly vocal while foraging (Hilty 2003). Calls in flight include "a squeak followed by a trill and short squeals, squeek, titititititititi sui, squi, squi ... (C. Parrish)" (Hilty 2003), and a slow series of reedy or hissing tic notes (Hilty 2003).
There are few available audio recordings of vocalizations of Tepui Swift; examples can be heard at xeno-canto and at Internet Bird Collection.