Fig. 3. Effects of manipulation of the gross temporal pattern on song
discrimination. Time taken by Cicada barbara males to respond to
unmanipulated and manipulated songs of C. barbara and C.
orni. Oscillograms are presented below the histogram. When pauses were
inserted into C. barbara song the stimulus became unattractive and
males could not discriminate it from the song of C. orni. Removing
the pauses within C. orni song resulted in a very attractive
stimulus, indicating that males are not able to discriminate between these
species using only the differences in the frequency spectra. Values are means
± 95% confidence intervals (N=5).
