The Woodlouse Spider is a medium-sized, distinctively colored spider with a bright red-orange cephalothorax, gray abdomen, and massive, oversize chelicerae adapted for piercing the tough cuticle of pill bugs (woodlice), which are its primary prey. Introduced from Europe, it is now common under logs, stones, and garden debris across much of North America. Despite alarming looking jaws, its bite is mild.
Best time to see a Woodlouse Spider
The best time to see a Woodlouse Spider is March–July, when about 61% of U.S. sightings happen, based on 16,440 research-grade iNaturalist observations.
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Recent Woodlouse Spider sightings near you
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