Red House Spiders

Facts, Identification, & Control

Scientific Name

Nesticodes rufipes

Appearance

What Do They Look Like?
  • Color: This spider varies in color, but primarily is reddish-brown over its entire body, including the legs.
  • Size: Adult females are about 1/5 to 1/3 of an inch in length, not including their leg span, which is about twice the size of the males.
  • Characteristics: Their abdomen is rounded – more or less shaped like a globe. The body is spotted with the females having a red band and a marking that resembles the hour glass shape of the black widow spider on the underside of their abdomen.

How Did I Get Red House Spiders?

Red house spiders typically enter through cracks and holes before finding their way to dark, cool spaces to nest. They like to make their webs in dark corners of homes.

How Serious Are Red House Spiders?

Homeowners often confuse red house spiders with a more dangerous species such as black widows. A female black widow spider also has a red hourglass mark on the underside of the abdomen and may also dwell in houses.

Do They Bite?

The red house spider’s bite is painful, but since its venom is non-necrotic it should not cause death of skin cells and a lesion as does a brown recluse bite.  These spiders are not aggressive, but will bite if their web is disturbed, so be cautious when cleaning out spider webs.

Signs Of An Infestation

The appearance of spiders, egg sacs, and the remnants of insect prey are signs of an infestation.

How Do I Get Rid of Red House Spiders?

What You Can Do

Prevention of red house spiders begins with making sure the population of insects that serve as food for spiders is kept to a minimum. Removing inside clutter that serves as harborage for spiders is also helpful including sealing cracks, gaps, and holes in:

  • Doors
  • Foundation
  • Windows
What Orkin Does

Your local Orkin technician is trained to help manage red house spiders and similar pests. Since every building or home is different, your Orkin technician will design a unique program for your situation.

Orkin can provide the right solution to keep red house spiders in their place and out of your home or business.


Behavior, Diet, & Habits

What Do They Eat?

These spiders like to feed on the following:

Where Do They Live?

Red house spiders create webs that look like a tangled mess of webbing attached to the walls and floors at multiple points.

These spider webs can be found indoors and outdoors in areas including:

  • Corners in closets
  • Cupboards and pantries
  • Dark corners
  • Corners of siding and foundations
  • Doorframes
  • Under leaves
Geographic Range

The red house spider is worldwide in distribution, but is reported to occur primarily in the states of Texas, Florida, and California.

Reproduction

Red house spiders breed throughout the year. The female spider creates a round egg sac that will be kept near the web, but not directly on it.