Brown Gerygone Call consists of Three-to five-syllable soft twitter, diddle-it-did-dit, around the same pitch. That is repeated rapidly and incessantly throughout the day, even when not breeding. The unobtrusive yet incessant twittering of the Brown Gerygone is among the characteristic sounds of the rainforests of eastern Australia.
The bird is abundant in these forests, where it lives year-round. Singly, in pairs, or in loose three or four out of breeding, it feeds quietly but energetically through the inner and outer foliage of the trees, at two-20 meters above the ground.
The birds frequently join foraging groups of other species to wander through the thick growth fringing the rainforests. Both sexes call while breeding, but the males twitter more loudly and insistently, often perching close to where the female is constructing the nest.
This call seems to maintain contact and announce territory, though it does not seem to have become as specialized for the latter purpose as in other Australian gerygones. Many birds lover recognized its call is what-is-it. Check out the video of Brown Gerygone Call like what-is-it