They're just feral monsters I guess.

Mechanical ecosystem, There's robot animals, Sentinels, Solver drones are apex predators, Disassembly drones are the average predators, Worker drones are basically the most civilized ones. Dont worry, Disassembly drones and solver drones are civilized, Just that they gotta hunt worker drones for food cause they're the easiest and they're so abundant.