Another addition to the Covenant military debuting in "Halo 2" were the Drones, or "Yanme'e", a flying, insectoid species from the planet Palamok. The animators found the creatures challenging, as they had to be animated to walk, run, crawl, or fly on multiple surfaces. Old concept art from "Combat Evolved" was repurposed in influencing the Drone's final shape, which took cues from cockroaches, grasshoppers, and wasps. Drones serve primarily in reconnaissance and skirmisher units, and are most commonly armed with simple, low-power weapons.