Astro tick
From Transformers Wiki
An astro tick is, presumably, a form of Cybertronic wildlife. They might be related to cyber-ticks and/or mech-ticks.
Fiction
G.I. Joe vs. the Transformers
Ironhide once compared the local number of Decepticons to the density of astro ticks found on Ravage's aft portion. G.I. Joe vs. the Transformers #5
