Bug Identifier
False Black Widow
Community identification

False Black Widow

Steatoda grossa

Order & Family
Araneae: Theridiidae
Size
6 to 11 mm for females, smaller for males
See this bug in the Encyclopedia

Natural Habitat

Typically found in sheltered areas such as crawl spaces, basements, outbuildings, and rock wall crevices.

Diet & Feeding

Carnivorous; feeds on a variety of insects and other spiders by trapping them in tangled webs.

Behavior Patterns

They are nocturnal, sedentary web-builders that spend most of their time waiting in a retreat; they exhibit a messy, scaffolding-style web.

Risks & Benefits

Benefits the ecosystem by controlling pest populations. While they can bite humans if handled, the bite is not medically significant like a true black widow, though it may cause localized pain and blistering.