
Community identification
False Black Widow
Steatoda grossa
- Order & Family
- Araneae: Theridiidae
- Size
- 6 to 11 mm for females, smaller for males
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.