Bug Identifier
Woodlouse Spider
Community identification

Woodlouse Spider

Dysdera crocata

Order & Family
Araneae, Dysderidae
Size
11 - 15 mm body length (0.4 - 0.6 inches), excluding leg span
See this bug in the Encyclopedia

Natural Habitat

Dark, damp places such as under rocks, logs, leaf litter, and occasionally indoors under carpets or in basements

Diet & Feeding

Carnivorous; primarily feeds on woodlice (sowbugs/pillbugs) using strong chelicerae (fangs) to pierce their tough exoskeletons

Behavior Patterns

Nocturnal hunter that actively stalks prey without building capture webs; constructs silken retreat sacs under debris or in crevices to hide during the day

Risks & Benefits

Benefits: Excellent natural pest control for terrestrial crustaceans and other garden pests. Risks: Can bite humans if mishandled, causing localized pain, swelling, and itching due to large fangs, though the venom is not medically significant.