Future Beetle (Primeval)

Future Beetles are cockroach-like creatures. Future Beetle drones were each about an inch long, while queens were each about the size of a small dog. Like cockroaches, it was also very difficult to to kill Future Beetles, and the Beetles could survive and almost instantly recover from being directly crushed under a boot. Unlike modern day beetles, Future Beetles lived in colonies, each with thousands of drones and a queen; the queen Beetle controlled the drone Beetles, and the drones would follow the queen wherever it went.

The bite of a single Future Beetle alone was virtually harmless - but in swarms, Beetles' bites were collectively so strong that they could chew through reinforced concrete in minutes, and could eat a full grown man alive very quickly; to the extent that within seconds of bringing the victim down, there would be no trace of it left. If the person were allergic to insects a Beetle can bite and kill a person in minutes.