Ultrasound acoustic startle response in scarab beetles.

  title={Ultrasound acoustic startle response in scarab beetles.},
  author={T. G. Forrest and Hamilton E. Farris and Ronald R. Hoy},
  journal={The Journal of experimental biology},
  volume={198 Pt 12},
We discovered an auditory sense in a night-flying scarab beetle, Euetheola humilis, the first scarab to be shown to hear airborne sounds. In the field, beetles were captured beneath speakers broadcasting ultrasound that simulated bat echolocation pulses. Apparently, the beetles took evasive action from a potential bat predator and flew into the traps. Using another behavioral assay in laboratory studies, the beetles were sensitive to frequencies ranging from 20 to 70 kHz at levels between 60… CONTINUE READING