Figures 2a-d in Bioacoustic study of a sound produced with forced air by larvae of Phileurus didymus (Linnaeus) (Coleoptera: Scarabaeidae: Dynastinae: Phileurini)

Figures 2a-d. Techniques for the observation of responses of the larvae to different disturbances. a) Disturbance with a wooden rod. b) Direct disturbance to the container. c) Response to disturbance close to the larva (Larva-larva interaction). d) Open-air exposure of larvae.