 Chirp-like squeaks similar to that of a well-rosined bird squeaker and a soft, purring series of trilled notes, lower in pitch than other calls, are heard.In general, the vocalizations of the short-tailed pygmy tyrant are all unlikely to be recognized as bird vocalizations, but are rather more like the sounds made by crickets or small frogs.The nest, a moss and fiber ball with a side entrance, is large for the size of the bird.