Domestic House Spiders

Scientific Name

Tegenaria domestica

General

Tegenaria domestica is called the domestic house spider, the common house spider, the barn funnel weaver spider and the lesser European house spider.

Appearance

The domestic house spider is a medium-sized spider. The females are about ¼- ½ inch long, excluding their legs, and the males are about ¼ – 3/8 inch long. These spiders vary from gray-brown to dark brown in color and have banded legs. The cephalothorax has two dark colored stripes, and the top of their abdomen has a pattern of brown and light-beige spots.

Behavior, Diet & Habit

These spiders can be found in structures anytime during the year and are very common in buildings or other man-made structures. Their preferred indoor habitats include cellars and dark basement corners. Their outdoor habitats include barns, storage sheds and other sheltered spots, such as wood piles and under rocks. The domestic house spider’s food sources are small insects that they trap in their web. This spider is more likely to be seen during warm weather months since the males are on the move seeking females with whom to mate.

Reproduction

Domestic house spiders can live for as long as seven years, producing upwards of nine egg sacs before re-mating. The spiders place their egg sacs close to the web and often hang them from above with threads of their silk. The males and females are usually together in the web from May through July, the normal mating season.

Signs Of An Infestation

This spider rarely produces enough individuals to develop an infestation, even though the presence of spiders inside usually causes alarm and a desire to exercise some spider control efforts.

Distribution

T. domestica is common throughout all of North America.

More Information

Do They Bite?
Domestic house spiders are very fast and will more often than not move away quickly during an encounter with the homeowner. However, if one of these spiders has no possible avenue of escape, they might bite, although documented cases of domestic house spider bites are extremely rare. If bitten, the symptoms may include slight pain, swelling and itching.

Sealing all cracks, gaps and crevices that provide access inside the home; using a vacuum or broom to remove spiders, webs and egg cases; and limiting the domestic house spider’s food sources and harborage sites are important prevention measures.

Should the homeowner need assistance to control of the domestic house spider or any other spiders, contact your pest management professional and request an inspection. Your pest management professional can then use his or her inspection findings to prepare a comprehensive pest management plan that will effectively and efficiently deal with the specific pest problem.