Southern House Spiders

Southern House Spiders in Upstate SC & Northeast Georgia

The Southern house spider (Kukulcania hibernalis) is one of the largest and most alarming-looking spiders homeowners encounter in Upstate South Carolina and Northeast Georgia. Although relatively harmless to people, its size and dark coloring make it a common source of "is this dangerous?" calls — and the male is frequently mistaken for a brown recluse.

Southern house spiders are part of the Filistatidae family, nicknamed "crevice weavers," because females typically remain associated with a web built around a sheltered crack or gap rather than wandering like adult males.

Southern house spider activity generally slows during colder weather and increases as temperatures warm, so sightings in Upstate South Carolina and Northeast Georgia are more likely during the warmer months. Males — not females — are the ones that wander and may end up indoors while searching for mates. Females typically remain associated with their webs and sheltered crevices.

Identification: What Southern House Spiders Look Like

This species shows strong differences between males and females, which is part of why it causes so much confusion.

Females:

• Body length: about 1/2–3/4 inch (13–19 mm)
• Color: dark brown to charcoal gray, almost velvety, with no distinct markings
• Build: robust, with a dark, velvety appearance and an oval abdomen
• Behavior: remains close to her web and sheltered retreat rather than wandering like adult males

Males:

• Body length: smaller, about 9–10 mm, but with much longer, thinner legs that make them look larger
• Color: lighter tan to amber
• Distinguishing feature: unusually long, thickened palps (the small appendages near the mouth) that look like an extra pair of legs
• Behavior: does not build a web; wanders at night looking for females, which is why males are the ones most often found inside homes

Southern House Spiders vs. Brown Recluse

Male Southern house spiders are frequently mistaken for brown recluses because of their coloring and general shape. A male Southern house spider typically has especially long, slender legs and a pair of unusually long palps in front that can almost look like an extra set of legs. Any marking on its back is much less distinct than the characteristic violin-shaped marking of a brown recluse, and its eight eyes are grouped together on a small raised area.

A brown recluse also has long, slender legs, but they are generally not as long in proportion to the spider as those of a male Southern house spider. Its palps are much shorter and less conspicuous. Brown recluses have six eyes arranged in three pairs and may have the characteristic violin-shaped marking on the cephalothorax.

The unusually long legs and prominent palps of a male Southern house spider are useful clues from a distance — no need to get close enough to count eyes.

Where Southern House Spiders Are Found

True to their "crevice weaver" name, females build distinctive, messy-looking webs that spread outward from a sheltered crack or crevice, with a retreat extending back into the opening.

Common locations include:

• Gaps in brick or masonry, especially around mortar joints
• Window and door frames
• Shutters and other exterior trim
• Soffits, eaves, and overhangs
• Cracks in siding, foundations, or outbuildings

They're found on houses, barns, sheds, and bridges throughout the South, and are far more common outdoors and in protected exterior spots than actually inside living spaces.

Signs You May Have Southern House Spiders

• A dense, irregular, lacy web concentrated around a single crack, hole, or gap
• A silk-lined tunnel leading from the web into the crevice
• A large, dark, stationary spider visible near the web entrance (the female)
• Occasional wandering spiders indoors, usually at night during the warmer months (males)

Are Southern House Spiders Dangerous?

Southern house spiders are not considered medically dangerous. They aren't aggressive, and documented bites are rare — the few reported bites have involved localized pain and swelling rather than serious effects. The bigger issue is usually the alarm caused by their size and resemblance to brown recluse spiders, as well as webbing buildup on the exterior of the home.

What Attracts Southern House Spiders to Your Home?

• Insect activity, especially flying insects drawn to exterior lighting — spiders follow their food source
• Unsealed cracks and gaps in brick, siding, or trim
• Undisturbed exterior areas, like shutters, eaves, and window frames, where old webbing accumulates
• Nearby structures, such as sheds or fences with similar crevices
• Warm-season mating activity, when males leave their usual hiding spots to search for females, and are more likely to wander indoors

How to Prevent Southern House Spiders

• Seal cracks and gaps in siding, brick, and foundation walls
• Repair or caulk gaps around window and door frames
• Reduce unnecessary exterior lighting or consider bulbs that are less attractive to flying insects
• Regularly knock down webbing around eaves, shutters, and entry points
• Keep vegetation trimmed back from the exterior walls

When Should You Call Compass Pest Management?

A large spider or dense web around a doorway or window is often a sign that other insects are active nearby, since spiders build webs where prey is plentiful — so getting rid of the spiders usually means addressing what's drawing them in.

Compass Pest Management offers home pest control throughout Greenville, Anderson, and Upstate South Carolina, as well as Cornelia and Northeast Georgia. Pest treatments and de-webbing eliminate existing spiders and unsightly webs, and ongoing service throughout the year keeps spiders from settling back in.

If house spiders or other pests have moved in around your home, request your free quote today.