Figure 4From: A meal or a male: the ‘whispers’ of black widow males do not trigger a predatory response in femalesCourtship vibrations of male Latrodectus hesperus . For each of the courtship vibrations including (1) abdominal tremulations, (2) walking and bundling silk, and (3) bundling silk and cutting displayed by Latrodectus hesperus males on empty webs of conspecific females, the upper panel depicts vibrations in the time domain, and the lower panel depicts vibrations in the frequency domain. The insert in (1) depicts the amplitude of abdominal tremulation (maximum baseline-to-peak amplitude = 0.7 mm/s) magnified 20 times.Back to article page