Drones are Cicada-like planes that the Grinders pilot and the basic attack machines of the Venjix Army. They can change from flight to ground mode. They fire out powerful laser blasts. They seem to resemble flying frogs.
Venjix pilots a special green drone and can make new robots of the same model to download himself into. It seemed to resemble a mantis. It was destroyed in the the same episode it debuted in.