(from the article `hawk moth`) The common name for Acherontia atropos, death`s head moth, derives from the fancied facsimile of a human skull on the upper surface of the body. ... Many species produce startling sounds. Hawkmoth caterpillars and the pupae of many gossamer-winged butterflies make squeaking or grating sounds when ... [2... Found on http://www.britannica.com/eb/a-z/d/21
Largest British hawk moth with downy wings measuring 13 cm/5 in from tip to tip, and its thorax is marked as though with a skull. When it is at rest it sometimes gives out a squeaking noise, produced probably by rubbing the palpi (sense organs close to the mouthparts) upon the proboscis. The caterpillar is about 10 cm/4 in long and is brigh... Found on https://www.encyclo.co.uk/local/21221