Arachnid · GBIF taxon 2157242
Triangulate Combfoot
Steatoda triangulosaAlso known as Triangulate Cobweb Spider, Triangle Cobweb Spider, Triangulate Space Spider
Triangulate combfeet build messy, tangled cobwebs in dark corners, basements, and under furniture where they wait upside down for creeping prey. A distinct chain of pale triangle shapes adorns the top of their bulbous reddish-brown abdomen, creating a striking geometric pattern. These unobtrusive spiders actively hunt ants, ticks, pillbugs, and other household pests, providing natural pest control indoors.
Web WeaverSynanthropicNocturnal
1 / 7—observations
—countries
—peak records
Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Diet & prey
- Ants
- Pillbugs
- Ticks
Predators
- Cellar spiders
- Centipedes
- Mud dauber wasps
ThreatsPesticide use and routine indoor cleaning
HabitatsHuman dwellings, basements, cellars, and rock crevices
Life span1 to 3 years
Size / weightNot available
Classification
- FamilyTheridiidae
- SpeciesSteatoda triangulosa
Range data is not available yet.
Interaction riskLow
- Low
- Moderate
- High
- Very high
- Why interaction risk is low
- Safe to observe at a normal distance.
Responsible observation
- Spotting webs: Look in dark, undisturbed corners near floors, under cabinets, or in basements.
- Peaceful coexistence: Leave them in low traffic spots where they hunt unwanted insects.
- Safe relocation: Invert a glass cup over the spider and slide a piece of paper underneath to carry it outside.
Co-Occurring Weaver (c) RAP, some rights reserved (CC BY), uploaded by RAP · cc-by
Competitor 
Close Relative (c) anonymous, some rights reserved (CC BY-SA) · cc-by-saClose Relative
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