Bug Identifier
Noble False Widow Spider
Community identification

Noble False Widow Spider

Steatoda nobilis

Order & Family
Order: Araneae, Family: Theridiidae (Cobweb spiders or Comb-footed spiders)
Size
Females typically have a body length of 8-14 mm, with a leg span up to 35 mm. Males are smaller, usually 7-11 mm in body length.
See this bug in the Encyclopedia

Natural Habitat

Commonly found in and around human habitations, including houses, sheds, outbuildings, and gardens. They prefer sheltered, dark, and undisturbed locations such as cracks, crevices, behind furniture, and in corners.

Diet & Feeding

Their diet consists mainly of various insects and other small invertebrates that get caught in their webs. They have also been known to prey on other spiders.

Behavior Patterns

Noble false widows are primarily nocturnal hunters, building irregular, tangled webs, often in sheltered locations. They are known for their synanthropic nature, meaning they thrive in human-modified environments. Females are typically sedentary once a web is established, while males may wander in search of mates. They can be aggressive when disturbed or defending their web/egg sac.

Risks & Benefits

Risks: The noble false widow spider is capable of delivering a bite to humans, especially if provoked or accidentally pressed against the skin. While their venom is not considered life-threatening to healthy individuals, a bite can cause localized pain, swelling, redness, and sometimes more severe reactions such as nausea, headache, or malaise. These symptoms usually resolve within a few days. Benefits: Like most spiders, they play a role in controlling insect populations, including common household pests.