Characteristics of the advertisement call of <i>Staurois parvus</i> and its acoustic environment.

<p>(A) Oscillogram and spectrogram of a representative advertisement call with 34 notes. (B) Power spectrum of the same recording showing the energy contained in the ambient noise produced by the fast-flowing stream at which males called. The peak at 5500 Hz represents the advertisement call of <i>S. parvus</i>.</p>