Woodlouse Spider

Also known as the pillbug hunter, or sowbug killer, the Woodlouse Spider is an arthropod with many names. It is an international species that may be found all over the world and is a member of the Dysderidae family. Male and female woodlouse spiders are around the same size, measuring 9 to 10 millimeters and 11 to 15 millimeters, respectively. Instead of having eight eyes, they have six, and their mouthparts, known as chelicerae, are disproportionately enormous. Their abdomens are yellowish-brown or grey, while their legs and bodies are orangish-red.

If you're looking for these spiders in Illinois, you'll probably find them hiding under bricks, logs, or anywhere else where woodlice are common. Although they occasionally hunt on centipedes and other spiders, as their name suggests, their main diet consists mostly of woodlice. Although their bite can be fairly painful due to their strength, people are not in danger from them.