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We found that females prefer calls with high amplitude stream noise added compared to those with low amplitude stream noise added for both high and low dominant frequency stimulus pairs however, stream noise itself was not attractive in the absence of calls.

To determine whether stream noise can act as a cue regarding the microhabitat characteristics of senders, we performed phonotaxis experiments using stimulus pairs constructed with synthetic male calls (high or low dominant frequency) and stream noise with varied signal-to-noise ratios. Here we identified an exception to this generalization in a streamside species, the little torrent frog ( Amolops torrentis) which communicates in a stream noise environment. Many kinds of environmental noise can interfere with acoustic communication and efficient decision making in terrestrial species.