Movie 2

Defence Sounds in a Nessus Sphinx Moth Caterpillar: Close up Videos of Mouthparts
This video demonstrates how the mouthparts of a 4^th instar A. floridensis caterpillar are held open during sound production. The caterpillar is making sounds in response to a light pinch to the abdomen. The sounds produced by the caterpillar are broadband but with the dominant frequency in the ultrasound. Therefore, to make the sounds more audible to a human, they were amplified using a bat detector positioned ~30 cm from the caterpillar. The video is played in real time.