Brown House Spider (False Widow)
Scientific Name: Steatoda grossa
Order & Family: Araneae, Theridiidae
Size: Body length typically ranges from 6 to 11 mm (0.24 to 0.43 inches) for females; males are smaller.

Natural Habitat
Commonly found indoors in houses, garages, and sheds, often in dark, sheltered areas like corners, under furniture, or in closets.
Diet & Feeding
Primarily eats insects and other spiders. They spin tangled cobwebs to catch prey.
Behavior Patterns
They are nocturnal and generally shy, non-aggressive spiders that spend most of their time in their webs. They go through several molts during their lifespan, which is up to 6 years for females.
Risks & Benefits
Generally beneficial as they control household pests. Their bite is not usually medically significant for humans but can cause localized pain, swelling, and mild malaise similar to a bee sting.
Identified on: 5/11/2026