The call is an unmusical "chirrup". The flycatcher produces a song that consists of a "cher cher chirrup" sound. On occasions they also issue a harsh rattling chirrup. Common terms in English include words such as "quack", "chirp" and "chirrup". In chirrup, whistle, slur and shake. The call is a harsh "chirrup" or a repeated, rising, buzz-like "zweeed". When at rest, they chirrup; when faced with an aggressive situation, they screech. The song was never recorded but the call was a nasal, three-syllable chirrup. The usual call is a "chirrup" but the song is distinctive and repetitive "". The chirr or chirrup sounds like a meow rolled on the tongue. Common onomatopoeic words for the sounds produced by stridulation include chirp and chirrup.