The unusual call may easily be mistaken for that of an insect or bird, particularly when heard during the day. Choruses develop at any time of day, during light to heavy rain, but unless this is followed by drizzle or heavy mist, cease immediately afterward. Minter (1998, 2003) found that calling males often take up elevated positions on fallen branches or small plants, or call from the soil surface (Text from Minter et al., 2004, © SI/MAB Biodiversity Program).
Minter (2003) report that morphologically, the species is difficult to separate from B. mossambicus and B. bagginsi, but can be easily distinguished from all Breviceps species by it’s advertisement call, a series of long, unpulsed, high-pitched whistles. Each calls varies from 0.6–1.98 s in duration and from 2755–3468 Hz in frequency (Text from Minter et al., 2004, © SI/MAB Biodiversity Program).