False Black Widow Spider

While the false widow is often misunderstood, it’s far less dangerous than the black widow spider. However, it still produces venom, which it uses to subdue its prey. This venom is not usually harmful to humans, but sensitive individuals may experience stronger symptoms.

​​False widow spiders can be eliminated using targeted pest control treatments such as residual insecticides, aerosol sprays, or dusts applied to cracks, crevices, and known hiding spots. For long-term control, professional pest management—like the services offered by A-1 Pest Control—ensures safe, effective collection and prevention. Removing clutter, sealing entry points, and reducing insects (their food source) also help prevent future infestations.

False black widow spiders (Steatoda spp.) are often mistaken for black widows due to their similar shape and color. They are typically dark brown to black, with a bulbous abdomen, and may have pale markings (e.g., cream, white, or reddish patterns) but lack the distinctive red hourglass of a true black widow. Their body size ranges from 5-10 mm (females) and 4-7 mm (males). Unlike black widows, their markings are less vivid and more varied, often forming bands or spots. If unsure, consult a pest control professional for accurate identification.

False black widows prefer dark, undisturbed areas such as basements, garages, sheds, or under furniture. Outdoors, they may inhabit woodpiles, garden debris, or under eaves. They build irregular, tangled webs close to the ground or in corners, often near their food source—insects. Check cluttered areas or poorly lit spaces in and around your home to spot their webs or hiding spots.

If you spot a false black widow, avoid handling it directly, as their bite may cause discomfort, especially for sensitive individuals. Use a jar or container to safely capture and release it outdoors if possible. For multiple spiders or suspected infestations, contact a professional pest control service like A-1 Pest Control to assess and treat the issue. Regularly clean and declutter your home, seal cracks, and install screens to prevent entry.

Yes, false black widows can bite if threatened or disturbed, but bites are rare and typically occur when the spider feels trapped (e.g., in clothing or bedding). The bite may cause mild to moderate symptoms like localized pain, redness, swelling, or itching, which usually resolve within a few days. In rare cases, sensitive individuals may experience nausea or muscle cramps. Clean the bite area with soap and water, apply a cold compress, and seek medical attention if symptoms persist or worsen.

To deter false black widows, reduce their food sources by controlling other insects with regular cleaning and pest treatments. Seal cracks, gaps, and entry points around windows, doors, and foundations. Keep outdoor areas free of debris, and store firewood away from the home. Regular vacuuming of corners, under furniture, and along baseboards can remove webs and egg sacs. For ongoing protection, schedule routine inspections with a professional pest control service.

False black widows are not aggressive and prefer to avoid humans. They typically only bite in self-defense when accidentally touched or trapped. Their reclusive nature means they’re more likely to hide than confront people. If you see one, give it space and avoid disturbing its web to minimize any risk.

Signs include multiple tangled, irregular webs in dark or undisturbed areas, such as corners, basements, or garages. You may also notice small, teardrop-shaped egg sacs (white or beige) in or near the webs. Frequent sightings of dark, bulbous spiders with pale markings could indicate a larger population. If you suspect an infestation, contact a professional pest control service for a thorough inspection and treatment plan.