Richard's singing veers from restraint to expressions of yearning, with a quavering timbre. Distinct enunciation and a quavering voice are also characteristics of Egyptian singing. The quavering cadences of Baskin's music evoke both the sweetness and self-indulgence of Carroll Barber. His unusual quavering voice leads to much mirth among the class. The song slithers inside itself, an eerily minimal vacuum of finger snaps and quavering synths. When she speaks during performances, she does so in a quavering and unclear voice. Additionally, fledglings can give a loud, quavering second-long whistle as a contact call.