Movie 1

Defence Sounds in a Nessus Sphinx Moth Caterpillar: Behaviour Following Attack
A 4th instar caterpillar of the Nessus Sphinx moth, A. floridensis, responds to a simulated predator attack by producing sounds and thrashing its body. During the first 29 seconds of the video, sound recordings are conducted with a regular camcorder microphone, and during the last 30 seconds sounds are amplified using a bat detector placed ~50 cm from the caterpillar. The bat detector converts high frequency sounds to low frequency sounds so that they are audible to humans. The video is played in real time.

Vocalization in caterpillars: a novel sound-producing mechanism for insects

Conrado A. Rosi-Denadai, Melanie L. Scallion, Craig G. Merrett, and Jayne E. Yack

Journal of Experimental Biology 2018. 221:None-None; doi: 10.1242/jeb.169466