Recommended Reading: Functioning Mechanical Gears Found In Insects
The nypmph Issus is the main natural life form to show utilitarian mechanical gears
Interestingly, as the creepy crawlies age, this actual composition disappears. It is obscure why the Issus bug loses this design as it ages, yet this in reality the main illustration of a characteristic machine gear-piece instrument with “discernible capacity.” As usual, nature came first.
You can peruse more about this entrancing revelation here .
(HT to @BillFactor )