Hacklemesh Weaver Spider is a member of the family Amaurobiidae, which produces cribellate, wool-like silk. It derives its name after the odd, ragged matting it builds, called a hacklemesh. These webs are knotted and thick and are usually located in dark and humid areas such as basements, logs and under rocks. The dark brown body of the spider and its hairy legs easily confuse it with funnel weavers, but the texture of its web is different. A 2020 article by the Entomology Department of the University of California indicates that Hacklemesh Weavers tend to prey on small insects by trapping them using their unique silver structure of silk. They are significant in the control of household pests.
| Characteristic | Description |
| Scientific Name | Amaurobius ferox (commonly), genus *Amaurobius* |
| Common Name | Hacklemesh Weaver Spider |
| Size | Adults measure 10–16 mm (0.4–0.6 inches); females are larger and more robust than males. |
| Color & Appearance | Dark brown to black body with lighter brown legs; abdomen often has subtle patterns or mottling. Body appears somewhat shiny and velvety. |
| Legs | Eight sturdy legs with fine hairs; adapted for navigating webs and crawling into crevices. |
| Eyes | Eight eyes arranged in two rows; vision is moderate, relying more on vibrations than sight. |
| Habitat | Found around woodpiles, tree bark, stone walls, outdoor sheds, and basements; prefers dark, damp cracks and crevices. |
| Behavior | Creates messy, funnel-like webs made of “hackled” silk; waits near the entrance to ambush prey. |
| Diet | Feeds on insects, pill bugs, beetles, ants, and other small arthropods. |
| Venom | Venom is mild; bites cause localized redness and swelling similar to a bee sting. Not medically significant. |
| Reproduction | Females create egg sacs inside their webs; spiderlings stay with the mother briefly after hatching. |
| Lifespan | Typically 1–2 years; females usually outlive males. |
| Geographic Range | Common in North America, Europe, and parts of Asia; often found around human structures. |
| Adaptations | Produces cribellate (wool-like) silk that tangles prey; excellent at surviving in dark, moist environments. |
| Predators | Birds, centipedes, larger spiders, and small mammals. |
| Activity Time | Nocturnal; primarily active at night while hiding during the day. |
| Prevention Tips | Seal cracks around doors, windows, and foundations. Reduce moisture in basements and crawl spaces. Keep firewood and debris away from exterior walls. Use yellow outdoor lights to reduce insects (prey). |
| How to Get Rid of Them | Remove webs using a broom or vacuum. Place sticky traps near wall edges and damp areas. Use natural repellents like peppermint oil along cracks. Call a pest control service for recurring infestations. |
What are the Key Characteristics of Hacklemesh Weaver Spiders?
Here are the five key characteristics of Hacklemesh Weaver Spiders:
- Web Type: The Hacklemesh Weaver constructs a cribellate web that is unique and not sticky. It is a web of very fine, silky wool in the form of a ragged, shaggy mat. The form is a thick web that traps the legs and body of prey and is scientifically referred to as a hacklemesh web.
- Hunting Style: Hacklemesh weavers are sit-and-wait predators. They conceal themselves in a silk hideout, usually under a rock or somewhere in a corner and await prey to bump into the web. The spider is alerted by the vibrations in the hacklemesh. It comes out fast to overcome the insect in a trap.
- Diet: These feed mainly on small insects and arthropods. They feed on different prey, such as flies, beetles, and other domestic pests. The spider is a generalist predator, and its wide-ranging diet aids in managing the population of tiny invertebrates.
- Defense Mechanisms: The first mechanism of defense of these spiders is retreat and camouflage. When they are disturbed, they hasten back to their silk-lined den or a dark crevice. Their brown or gray color is perfect in their habitats of choice as it helps them to be unseen to predators.
- Lifespan: The average Hacklemesh Weaver Spider life span is one or two years. They spend the majority of their time in or around their webs. The availability of food and the temperature are environmental factors that directly affect the duration of their full life cycle and their survival.
Where Do Hacklemesh Weaver Spiders Live?
Here are the four details on the habitat and range of Hacklemesh Weaver Spiders:
- Habitats: Hacklemesh Weavers survive well in cryptozoic environments. These are cloaked and dark environments that are close to the ground layer. They build their webs on litter, on rotting wood, and in crevices of natural or artificial buildings. The web has a silk-lined tube or retreat where the spider is waiting.
- Resting Spots: The spiders sleep in their silk-lined retreats in their hacklemesh web. These are very good spots to provide protection and cover. Popular resting sites in the outdoors are under rocks and piles of wood. They usually use wet basements, cellars, and gullies on the ground level.
- Geographic Range: The spiders are mainly located in North America. They are very found in the United States and Canada, especially in the eastern parts. The species is European and it was introduced in North America, where it has been established since then.
- Preferred Conditions: Hacklemesh Weavers like the dark and damp environment. They look in places of great moisture and reduced light. They are mostly found in basements and piles of garbage. This family of spiders finds an environment where they can experience stable conditions against the extremes of temperature.
How Can You Identify a Hacklemesh Weaver Spider?
Here are the five key physical traits used to identify a Hacklemesh Weaver Spider:
- Size: Hacklemesh Weavers are medium and small-looking spiders. Adults vary in dimension between 5 and 16 millimeters ( 0.2 to 0.6 inches). Women are usually bigger and stronger than men. The leg length is usually approximately the dimensions of a U.S quarter.
- Coloration: The appearance of these spiders is two-colored. The cephalothorax (head and thorax) is normally dark brown in color, shiny and brownish. The abdomen is either paler gray, tan, or dark brown or has herringbone or light colored spots on the back.
- Body Structure: Hacklemesh Weavers are strong with a rather fat body structure. Its cephalothorax is smooth and shiny. The abdomen is oval and densely covered with a fuzzy-like hair, unlike the smooth cephalothorax. They have eight eyes that are in two rows.
- Legs: They have eight short, rugged legs. The legs are usually of the same color as the cephalothorax, reddish-brown. The males also tend to have longer and thinner legs than the females. Three claws on each leg are typical spider web-building characteristics of this species.
- Behavioral Traits: The irregular, fuzzy web structure is the most definite characteristic. The silk-lined tube retreat is in the web constructed close to the ground or in crevices. These are nocturnal spiders. They are nocturnal and ambush their prey during the day and are soon trapped in the cribellate (wool-like) silk web.
How Can You Prevent Hacklemesh Weaver Spiders Around Your Home?
Here are five effective methods for preventing Hacklemesh Weaver Spiders:
- Seal Entry Points: Control interior access, preventing building exterior gaps. Seal cracks in the exterior walls and foundation using caulk. Fit close screens on the windows and well-sealed sweeps on the bottom of the doors to prevent entry.
- Reduce Moisture: Hacklemesh Weavers love dampness and thus lowering humidity discourages them. Seal leakages on pipes and faucets outside. Use dehumidifiers in the damp places such as basements and crawl spaces, to ensure the air is dry.
- Remove Clutter: These spiders find excellent places to construct their retreats in clutter. Piles of wood, boxes and debris belonging to the foundation and walls of the house. Indoors, create storage spaces such as basements and garages to get rid of possible nesting spaces.
- Regular Cleaning: Clean corners and crevices of existing webs, egg sacs, and spiders with the vacuum. Clean the webs and spiders out behind furniture and in places where you rarely use like crawl spaces, with a stiff brush or a broom. This restricts the population of spiders in the house.
- Outdoor Maintenance: Keep the space around your house. Eliminate rocks and litter and other ground debris around the base, destroying the outdoor nesting sites of the spider.
Are Hacklemesh Weaver Spiders Dangerous?
Hacklemesh Weaver Spiders have non-toxic venom that paralyzes their prey. They are not aggressive and only bite when provoked and when they are trapped. The number of bites is very low and has only slight irritation or redness. The majority of people do not come in touch with them as these spiders remain in their nets. Their sedentary character and little contact make them harmless to people and useful in the control of pests in nature.
