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Many species of beetle live inside live and decaying trees, branches and logs when they are in larval form. It is possible to detect the sounds with a contact microphone. The sounds tend to be either very short clicks caused by feeding or more noise-like due to movement. The recording here is of the larva of a Two-banded Longhorn Beetle (Rhagium bifasciatum) inside a pine log. Both types of sound can be heard.
Download Rhagium bifasciatum.mp3 (468.8 KB)
Dragonfly compound eyes are made of up to 30,000 separate facets or 'ommatidia'.
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