Black Widow Spider


The black widow spider is one of the most dangerous spiders in North America and found along the western coast. Its venom is 15 times more potent than a rattlesnake’s venom.  The venom is designed to immobilize and/or kill the spider’s prey.

Adult Female Black Widow Spiders have a black, shiny body with a large, spherical abdomen and long, black legs.  They have a distinctive red or orange hour glass on the underside of the abdomen. Females are larger than males (40mm vs. 30mm).

Adult Male Black Widow Spiders have a lighter in body color (pale green-grey) than females, males have a yellow-orange hourglass on their underside. The hourglass shape is broader in the middle than that of females. They also typically have a red or pale brown stripe down the center of their backs.

Young Black Widow Spiders (Nymphs)  are all white at first. Nymphs become more similar to their final appearance during their 2-3 month growth period.

Black Widow Spider Egg Balls are grayish, silken masses found in the spider’s web. They typically contain between 200 and 900 eggs. Not to worry, though. After the eggs hatch, the nymphs are cannibalistic, so only a few will actually survive. A female can produce more than 10 egg sacs from one mating.

Black Widow Spider Behavior

They prefer living and building their webs in dimly lit, dry, sheltered places. Beware of the corners and nooks around your yard and home (such as your garage, basement, attic where there are areas of undisturbed clutter). Black widow spider webs are typically near the ground, messy and irregular in appearance.

Only adult and large, juvenile female black widow spiders have mouths that are large enough to actually harm people. Black widow spider bites are typically not fatal to people, but the physical reactions to a bite are painful and can spread throughout the body. Children and elderly are particularly at risk. If you are ever bitten by an unknown spider, don’t hesitate to call 911 and seek immediate treatment.

Black Widow Spider Pest Control

Contact Pro Active Pest Control for quick and effective black widow spider pest control in RosevilleEl Dorado HillsRancho CordovaLincolnRocklin, and Sacramento. Regular inspection and pest control service is the key to effective pest control. We use only the best pest control products and methods to keep pests away from your home and family. Most of our services are done on the exterior to prevent pests from getting in your home. All of our customers are covered under our 100% service guarantee.

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