Barn Funnel Weaver, Southern House Spider, or Grass Spider
Agelenopsis aperta or Kukulcania hibernalis (likely a crevice weaver or funnel weaver)
Agelenidae (Funnel Weavers) or Titanoecidae/Filistatidae, Order Araneae. Key family characteristics include long spinnerets and a typical building of sheet webs ending in a retreat funnel.
Physical Description
Compact, robust body with a dark, velvety appearance. The cephalothorax is slightly elongated, and the abdomen is oval and covered in fine setae giving it a fuzzy or dark texture.
Size Estimate
Body length estimated around 10-15 mm with a leg span of approximately 25-35 mm, typical of a sub-adult or small adult wandering indoors.
Coloration & Markings
Uniformly dark brown to blackish coloration across the entire body, without highly contrasting dorsal markings visible in this lighting.
Web Type
Does not typically build orb webs; instead constructs sheet-like webs or retreats in crevices, though wandering specimens found on carpets are often searching for mates or shelter.
Eye Arrangement
Eyes are clustered closely together on the anterior portion of the cephalothorax, typical of many ground-dwelling or crevice-dwelling spiders.
Leg Characteristics
Legs are moderately long, sturdy, uniform in thickness, and covered in fine hairs with subtle spination, often held slightly splayed outwards.
Venom & Safety Information
Venom Information
Contains mild venom used to subdue small invertebrate prey. Not specialized for defense against large vertebrates.
Medical Significance
Not medically significant to humans. Bites are rare, usually only occurring if the spider is directly trapped against skin, and typically result in minor local irritation similar to a mild ant bite.
Safety Recommendations
To remove from living areas, gently place a cup over the spider, slide a piece of paper underneath, and release it outdoors. Seal home entry points to prevent future indoor wanderers.
Habitat & Behavior
Habitat & Range
Found globally in temperate and tropical regions, frequently wandering into homes, basements, and dark corners near ground level.
Behavior & Temperament
Generally timid and fast-moving. When encountered in the open, they will quickly seek dark cover or retreat rather than display aggression.
Diet & Prey
Carnivorous, feeding primarily on crawling insects such as beetles, roaches, ants, and silverfish.
Seasonal Activity
Most commonly encountered indoors during autumn when dropping temperatures drive spiders inside, or during peak mating seasons when males actively wander.
Description
This dark, velvety spider is a common indoor wanderer, often appearing unexpectedly on carpets and walls as it searches for shelter or a mate. While its dark coloration and hurried movements can startle homeowners, it is an efficient, harmless predator that helps control household pest populations.
Key Features
Uniformly dark or blackish body, compact robust shape, prominent spinnerets (if visible), and rapid, darting movement.
Similar Species
Can be superficially confused with wolf spiders (Lycosidae) or male black widows (Latrodectus), but lacks the distinctive red hourglass and carries a less potent venom profile.
Life Cycle
Females produce silken egg sacs in secluded retreats. Spiderlings disperse via ballooning or walking shortly after hatching, undergoing multiple molts to reach maturity over a one-to-two-year lifespan.
Ecological Importance
Acts as a natural pest control agent inside and around buildings, helping to keep populations of nuisance insects in check.
Conservation Status
Not evaluated by the IUCN, highly abundant and widespread globally with stable populations.
Interesting Facts
Many dark wandering spiders possess excellent tactile sensitivity through specialized hairs on their legs, allowing them to detect microscopic vibrations in flooring and walls.
Photography Tips
Use macro lenses with natural side lighting or an external diffuser to highlight fine hairs and body textures. Maintain a steady hand and shoot from a parallel angle to capture leg and eye arrangements clearly.
Identified: 2026-08-23T17:53:57.868508