But not all of it will. The current bio-drone only has a biodegradable body and circuits. The motors, battery, sensors, and rotors that give the drone power and the ability to move were borrowed from a commercially-made quadcopter. Researchers hope to make the sensors biodegradable next. If lost right now, the body and the brains of the drone would break down, but its mechanical guts wouldn’t, leaving a drone skeleton in its place.