Assassin bugs in Illinois and Wisconsin control garden pests with venomous bites similar to wasp stings, healing slowly.

Assassin bugs, or "wheel bugs," are beneficial insects in Illinois and Wisconsin that help control garden pests. They possess sharp mouthparts to inject venom into prey, immobilizing them. While not aggressive, they can bite if threatened, causing pain comparable to a wasp sting and lasting numbness. Their bite can take weeks to heal, and they emit a foul smell when crushed. It is advisable to avoid touching these insects.