Owls communicate through vocalizations (calls) that are used to defend territorial areas or ti attract females. Each owl species has its own repertoire. For the Bearded Screech-Owl the main call is given by the male. This is a quiet and low-pitched, cricket-like trill of 3-5 s in duration, rising and dropping at the end. This is the territorial (or A) song. Bearded Screech-Owls also give a soft ventriloquial hu (Howell and Webb 1995). In the field, the sexes can be identified by voice: the calls of the male are lower in pitch than are the calls of the female. The courtship (B) song has not been recorded in this species (Marshall 1967, König et al. 1999).
There is no report of geographic variation in vocalizations in the Bearded Screech-Owl.