Black Widow Removal in Los Angeles: Where They Hide

Black widow removal in Los Angeles starts outside the house. Black and brown widows nest under patio furniture, along wall caps, in trash bin handles and by garage doors, most within about three feet of the ground. Effective removal takes the spider, its web and every egg sac out physically, then adds a perimeter treatment and control of the insects they feed on. PesPro does this across Los Angeles and San Bernardino counties under a 30-day guarantee.

Where do black widows hide around Los Angeles homes?

Widow spiders hide in dark, dry, sheltered spots that people rarely disturb, and nearly all of those spots are outdoors. A UC Riverside survey of 72 Southern California sites found 78 percent of brown widows within one meter of the ground and none inside living spaces. Black widows take protected holes and gaps; brown widows settle under exposed surfaces with a small overhang.

Check these spots first, flashlight and gloves on:

Patio furniture. Picnic and patio tables were the top brown widow retreat in the UCR survey, followed by plastic chairs with ridged undersides. Solid tops and seats attract them; mesh does not.
Fence rails and wall caps. The horizontal support of a wood fence and the overhanging cap of a brick or stone wall. A two-inch overhang is enough.
Garages and sheds. Black widows web near the garage door and vents and emerge at night from the gap between door and frame.
Trash bins and potted plants. The recessed handle under a plastic bin and the curled lip of a nursery pot, exactly where fingers go.
Electrical boxes, hose reels and faucets. Small covered fixtures that stay dark.
Woodpiles and stored clutter left untouched for months.

Multi-unit properties add playground equipment, benches and shared trash bins, all common brown widow sites in the survey. Common areas are covered by the property manager program.

How do I tell a black widow from a brown widow?

An adult female black widow is shiny black, about half an inch long, with a red hourglass on the underside of the abdomen. A brown widow is smaller, about three eighths of an inch, mottled tan, brown and gray, with an hourglass that is usually orange. A mature brown widow looks much like an immature black widow, so the egg sac is the surest clue. Black widow sacs are larger and smooth; brown widow sacs are covered in silk spikes and often sit in clumps of several to dozens.

Brown widows were first collected in Southern California in Torrance in 2003. At the urban homes in the UCR survey, brown widows outnumbered black widows about twenty to one. Their bite is much milder, which changes the medical risk but not the removal plan: both species are handled the same way.

When are widow spiders most active?

Widow spiders are nocturnal. They come out at dusk and sit on the web at night, so a daytime check misses most of them, and black widows especially. Spiderlings disperse by releasing silk and ballooning on the wind. UC IPM notes they keep dropping onto properties through the year, so control has to be repeated.

A black widow sac holds about 300 eggs and a brown widow sac about 130. One brown widow can produce 20 or more sacs in her life, and a black widow more than 10 after a single mating. That is the case for a recurring exterior program rather than a single spray.

Can I remove a black widow myself?

Yes, with gloves, a vacuum and some care. Most bites happen when a hand presses on a hidden spider or when one is trapped against skin in clothing.

Work at dusk or after dark with a flashlight, when the spider is out on its web.
Wear a long-sleeved shirt and gloves, and shake out gloves, boots and stored items before use.
Vacuum the spider, the web and every egg sac. Seal the bag and put it in the outdoor trash.
Pull down any sac you cannot vacuum and bag it. Water-based sprays do not kill the eggs inside.
Clear the clutter the spider was using, and stack firewood away from the house.

Insecticides do not give long-term control of spiders, and UC IPM advises against using them outdoors for spiders in most cases. With any pesticide, read and follow the label.

If someone is bitten, stay calm, wash the site with soap and water, apply a cold compress, and do not try to remove venom. Black widow venom causes pain at the bite that can spread to the chest, abdomen or the whole body, with sweating and rigid stomach muscles. Seek medical attention right away for any suspected black widow bite. Small children, older adults and people with health problems face the most serious effects.

What does professional black widow removal include?

PesPro's spider control service removes existing spiders, clears webs and egg sacs, creates a perimeter barrier and addresses the insects that attract spiders. In practice that means:

Finding the harborage. The technician checks furniture undersides, wall caps, fence rails, bin handles, pot lips, electrical boxes and the garage door edges.
Physical removal of spiders, webs and egg sacs. Removing sacs matters more than killing adults, because each sac is the next generation.
Perimeter barrier on the exterior harborage zones where spiders and their prey travel, using pet-safe and child-safe formulations that follow California DPR guidelines.
Prey control. Treating ants and other crawling insects along the foundation removes the food supply. Spider control is part of our bi-monthly and quarterly general pest control program. What draws spiders to a property is covered in why spiders are in your home.

The written quote is free, and pricing depends on property size, pest type and service frequency. Verify any company before you book: PesPro holds Structural Pest Control Board license PR-6378, checkable on the Board's license search, and is QualityPro certified. Same-day service costs an extra fee and depends on the day's route. We serve Los Angeles and San Bernardino counties; see the service area list.

What does the PesPro guarantee cover for spiders?

Every PesPro service comes with a 30-day guarantee, and it works in two tiers. For cockroaches, bed bugs and rodents, a third visit is included at no extra cost if the problem reappears within 30 days. For every other pest, spiders included, another visit within the 30 days costs 30 percent of the original price. Ask us how the guarantee applies to your case. Full terms are on the guarantee page.

To schedule an inspection, contact PesPro or call (323) 472-5329.

Frequently asked questions

Are brown widows dangerous?

Less than black widows, but not harmless. UC Riverside describes the brown widow bite as minor compared with a black widow's. In a series of 15 verified bites, victims had pain at the bite and a red mark, with none of the classic black widow symptoms. The practical concern is where they sit: under chair seats, in bin handles and on pot lips, where hands press down on them.

Does spraying kill black widow egg sacs?

Usually not. UC IPM notes that most registered sprays are water-based while egg sac silk repels water. In a 2016 study, water-based insecticides had no significant effect on brown widow egg sacs. Removing the sac by hand or vacuum removes the eggs with it. That is why a PesPro visit starts with physical removal of spiders, webs and sacs, and the perimeter barrier comes after.

How often does the perimeter need treatment?

More than once. UC IPM says spiderlings keep dropping onto properties, so control has to be repeated through the year, and insecticides do not provide long-term control on their own. PesPro's bi-monthly or quarterly visits, set after the inspection based on the pressure around your property, keep both the spiders and their prey low.