(IMAGE) Friedrich-Schiller-Universitaet Jena Caption This is the 3-D-reconstruction of a head of a Death's head hawk moth based on computer tomograph data. The white arrows mark the movements of the muscles when air is inhaled. In the process, the front gullet (green) is extended and air (blue arrow) is sucked in through the thereby created vacuum . The air passes a flap, the so-called epipharynx (red). The flap is pressed against the incoming air by muscle power. As a consequence the flap starts to vibrate in the air stream and a sound is produced. Credit Illustration: Phyletic Museum/FSU Jena Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.