Cybermite

Cybermites were cybernetic insects, controlled and created by the Cybermen. According to the Doctor, they were a heavily upgraded form of Cybermat. Even one could partially convert people, but to have a full upgrade would take a very large swarm. Because of this, they usually travelled in small swarms, and went directly for the victim's head. They were not used in the upgrade process for a full cyber-conversion. (TV: Nightmare in Silver)

After Hedgewick's World of Wonders was destroyed with the three million Cybermen on it, it was assumed the revival of the Cybermen was thwarted. However, a single Cybermite survived, drifting in space. (TV: Nightmare in Silver)

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