Beetle Drones are the second and current robotic army of Aku in Samurai Jack.
After Aku created the X-Models, he considered them useless as all but one got killed. As a result, Aku and his scientists created the Beetle Drones. When Jack arrived at the future, he attacked Aku's army of Beetle Drones at a mining outpost. During Jack's journey back into time, Aku kept sending his robots to destroy Jack. They have been upgraded to fly.