Tracking Drones are malicious spider-like bots that normally travel in packs, clamping onto anything unfortunate enough to get too close. Although they do little damage alone, their sheer number in a group make them a hazard if not dealt with promptly.
These monsters can also be used as an effective alternative to the Painkiller. With Criminal Networking Augments Level 3, you can heal on every kill. Drawing in a large group of Tracking Drones and dispatching them is a great way to heal yourself quickly, as you will heal much more then the damage you will take. Be careful though, not to take on Tracking Drones too powerful for you or you may be slaughtered.