Barn Funnel Weaver, Domestic House Spider
Tegenaria domestica (or related Agelenidae / Zoropsidae)
Agelenidae (Funnel-web weavers), Order Araneae. Key family characteristics include three pairs of spinnerets with the posterior pair being noticeably elongated, and a propensity for building sheet webs that end in a funnel-shaped retreat.
Physical Description
Elongated body shape with a distinct oval abdomen and a somewhat flattened, pear-shaped cephalothorax. The body appears slightly velvety or covered in fine setae rather than smooth. Proportions show robust legs relative to a moderately sized body.
Size Estimate
Body length is roughly 10-15 mm with a leg span approaching 30-40 mm, consistent with an adult or sub-adult house dwelling funnel weaver.
Coloration & Markings
Muted earthy tones of brown, tan, and grey. The cephalothorax features characteristic darker longitudinal stripes or markings, while the abdomen typically displays a mottled or chevron-like pattern down the dorsal side.
Web Type
Does not apply directly to this active wandering individual, but species in this family typically build flat, non-sticky sheet webs terminating in a tubular retreat where the spider waits for prey.
Eye Arrangement
Eight small eyes arranged in two slightly curved horizontal rows of four, typical for many wandering and web-building spiders of this general group, though exact details are obscured in the image.
Leg Characteristics
Long, robust legs with noticeable spines and faint dark banding. The legs are typically spread wide in a flat, sprawling posture when resting against vertical or horizontal surfaces.
Venom & Safety Information
Venom Information
Contains mild, insect-specific neurotoxic venom used primarily to immobilize prey. It is not considered dangerous to humans.
Medical Significance
Harmless to humans. While a defensive bite is theoretically possible if trapped tightly against the skin, it is exceedingly rare, causes only mild localized pain or redness similar to a mosquito bite, and requires no special medical treatment.
Safety Recommendations
No special safety measures are required. If removal is desired, gently place a cup over the spider, slide a piece of paper underneath, and release it safely outdoors.
Habitat & Behavior
Habitat & Range
Found worldwide in temperate regions, commonly associated with human habitations such as basements, cellars, garages, and corners of rooms, as well as barns, sheds, and under bark outdoors.
Behavior & Temperament
Fast-moving, nocturnal or crepuscular hunters. They are generally timid and prefer to flee rapidly when disturbed rather than show aggression, though females guarding egg sacs may stand their ground.
Diet & Prey
Primarily feeds on crawling and flying insects including flies, mosquitoes, roaches, and other small arthropods caught in their sheet webs or ambushed nearby.
Seasonal Activity
Active year-round indoors, with mature males frequently wandering out in late summer and autumn in search of females, making them much more noticeable during these months.
Description
A common household visitor, this brownish, long-legged spider is well-adapted to living alongside humans in quiet corners and dark crevices. Far from being a threat, it serves as a beneficial predator that keeps indoor insect populations in check.
Key Features
Elongated spinnerets (family Agelenidae), mottled brownish body with longitudinal cephalothorax stripes, and long spiny legs adapted for rapid running.
Similar Species
Wolf spiders (Lycosidae) which do not build webs and carry egg sacs on their spinners, and Grass spiders (Agelenopsis) which inhabit outdoor lawns and gardens rather than indoor corners.
Life Cycle
Females construct silken egg sacs in secluded areas near their webs, depositing dozens to hundreds of eggs. Spiderlings hatch, undergo multiple molts, and can live for several years under favorable indoor conditions.
Ecological Importance
Acts as an effective natural pest controller in homes and outbuildings, helping to suppress populations of nuisance insects without the need for chemical pesticides.
Conservation Status
Not evaluated by the IUCN, but highly abundant, widespread, and thriving globally in association with human environments.
Interesting Facts
These spiders have remarkable speed and can cover surprising distances in fractions of a second when startled. They rarely venture away from their webs unless searching for a mate.
Photography Tips
Use natural or diffused macro lighting to capture the dorsal patterns clearly. Maintain a safe distance and photograph from directly above or at eye level to capture leg spination and cephalothorax markings.
Identified: 2026-08-14T04:04:51.303818