Tegenaria domestica

Tegenaria domestica, commonly known as the barn funnel weaver or domestic house spider, is a species of spider that is often found in human habitats. This spider is known for its unique physical appearance and web-spinning abilities, as well as its important role in controlling insect populations.

Physical Characteristics

The Tegenaria domestica spider is typically brown or gray in color and measures between 7 and 18 millimeters in length. The male of the species is usually smaller than the female and has longer legs relative to its body size. The most notable physical characteristic of the barn funnel weaver is its funnel-shaped web, which is typically found in the corners of rooms, closets, and other hidden areas.

Habitat and Distribution

The barn funnel weaver is native to Europe but has since spread to other parts of the world, including North America. It is commonly found in homes, barns, and other structures, especially in areas with a lot of clutter. These spiders prefer dark, cool, and moist environments, which is why they are often found in basements, attics, and crawl spaces.

Behavior and Diet

Tegenaria domestica is a nocturnal spider, which means it is most active at night. During the day, it retreats to its funnel-shaped web and waits for prey to come within range. The spider’s web is made of silk and is designed to trap insects that fly or crawl into it. Once trapped, the spider quickly immobilizes its prey with venom and then wraps it in silk before consuming it.

The barn funnel weaver is not considered dangerous to humans, although it may bite if it feels threatened. Its venom is not toxic to humans, and its bite is typically no worse than a bee sting. However, people who are allergic to spider bites should seek medical attention if they are bitten by a Tegenaria domestica.

Ecological Importance

Despite its somewhat intimidating appearance, the barn funnel weaver plays an important ecological role in controlling insect populations. By preying on flies, mosquitoes, and other insects, it helps keep their populations in check and reduces the need for chemical pesticides. In addition, the spider’s silk is an important material for scientific research, as it has a unique combination of strength, elasticity, and toughness.


In conclusion, Tegenaria domestica is a fascinating and important species of spider that is commonly found in human habitats. Although it may seem intimidating, it is not dangerous to humans and plays an important ecological role in controlling insect populations. Its unique physical characteristics and web-spinning abilities make it an interesting subject for scientific research, and its presence in homes and other structures should be appreciated for the valuable role it plays in the ecosystem.

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