Black Widow Spiders in the San Gabriel Valley: Where They Hide and How to Control Them
Black widows are common in the San Gabriel Valley — and they like the same garages and yards your family uses. Here's where they hide and how we keep them down.
Most spiders around your home are harmless web-builders. The black widow is the one worth taking seriously in the San Gabriel Valley — it's venomous, and it favors exactly the spots people reach into without looking.
Where black widows hide
Black widows like dark, undisturbed, sheltered spots: garages and sheds, woodpiles, meter and utility boxes, under outdoor furniture and grills, in patio corners, block walls, and the eaves and crevices around the house. Their web is messy and irregular — not the neat wheel of a garden spider — and strong-feeling when you brush it.
How to recognize one
An adult female is glossy jet-black with a red hourglass marking on the underside of the abdomen. They're shy and stay near the web rather than roaming. Round, papery egg sacs in the web mean a population is building.
Are black widows dangerous?
They're venomous, and a bite can cause real symptoms — muscle pain, cramping and more — so a suspected bite warrants medical attention. That said, widows are not aggressive; most bites happen when one is pressed against skin, like reaching into a cluttered garage shelf or pulling on stored items. The goal is keeping them away from where people and pets actually are.
How we control them
Control is web and egg-sac removal, targeted treatment of the harborage spots above, and reducing the clutter and insect prey that draw them in. Ongoing perimeter spider control keeps numbers down around garages, patios and play areas between visits. If widows keep showing up, it's worth bringing in a pro: (626) 409-1584.
Quick Answers
Quick Answers.
Where do black widows hide around the house?
Dark, undisturbed spots: garages and sheds, woodpiles, meter and utility boxes, under outdoor furniture and grills, patio corners, block walls, and eaves. Their web is messy and irregular rather than a neat wheel.
Are black widow spiders dangerous?
They're venomous, and a bite can cause muscle pain and cramping, so a suspected bite should get medical attention. They aren't aggressive, though — most bites happen when a widow is accidentally pressed against skin, such as reaching into a cluttered shelf.
How do you get rid of black widows?
Web and egg-sac removal, targeted treatment of harborage areas (garages, woodpiles, meter boxes, patio corners), and reducing clutter and the insect prey that attract them — followed by ongoing perimeter control to keep numbers down.
How can I keep black widows away from kids and pets?
Reduce clutter and woodpiles near play areas, knock down webs and egg sacs, seal gaps, and keep up a perimeter treatment around garages, patios and yards. Wear gloves when reaching into stored items in the garage.
About the Author
Joshua is the owner and licensed operator of ExterMetro Termite and Pest Control in Arcadia, CA. He holds California SPCB Company Registration #8828 (Branch 2 & 3), is a licensed WDO inspector, and has worked San Gabriel Valley homes and businesses for over twelve years — doing every inspection and treatment himself.
About the Author
Joshua is the owner and licensed operator of ExterMetro Termite and Pest Control in Arcadia, CA. He holds California SPCB Company Registration #8828 (Branch 2 & 3), is a licensed WDO inspector, and has worked San Gabriel Valley homes and businesses for over twelve years — doing every inspection and treatment himself.
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