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The Sacramento Region's Guide To Dangerous Spider Identification
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The sacramento region's guide to dangerous spider Identification

In the United States, there are two names to fear when it comes to spiders. You're probably already familiar with them. They are widow spiders and recluse spiders. The widow name is connected to black widow spiders and brown widow spiders, which have venom that can be a medical threat to humans. The recluse name is connected to brown recluse spiders, Mediterranean recluse spiders, Chilean recluse spiders, and desert recluse spiders. The venom from a recluse bite can lead to a disfiguring wound caused by necrosis.

In the Sacramento region, black widows and brown widows are the spiders to be most concerned about. They can come into our yards and accidentally get into our homes which can lead to unwanted encounters. These are the spiders we're going to focus on today. Here are a few tips to help you with Sacramento spider identification and spider bite prevention.

Quick Spider Prevention Tips

In light of how difficult it is to identify dangerous spiders, we recommend taking precautions around any spiders on your property, and any webs that look tangled.

  • Wear gloves when working out in your yard.
  • Wear footwear, particularly at night.
  • Be cautious around brush and wood.
  • Use a broom to remove webs; don't ever use your hands.
  • Destroy any paper-like egg sacs you find attached to webbing.

Dangerous Spider Control In The Sacramento Region

Do you live in the Sacramento Region? If so, let the HomeShield Pest Control team help you identify and control these spiders. Our technicians are highly trained and they've had a lot of experience with identifying spider species and performing spider extermination services. We'll help you figure out what spiders you have and what you can do about them.

To learn more about our offered Sacramento Region pest management services or to get started, connect with us today for assistance!

What You Need To Know Most

It isn't easy to properly identify a black widow or brown widow when they are young spiders. There is a large variation in physical characteristics as these spiders grow from spiderlings into adults.

If you want to know for sure what spider you're dealing with, and you're able to catch it, we recommend sending the specimen to us or to an entomology department at a university. A glue board or similar trap can help you do this. We don't suggest capturing one of these spiders by hand—for obvious reasons. You may also take a photo of a spider you're finding in your home or on your property and send it by email.


One of the most helpful ways to distinguish a dangerous spider from a spider that isn't dangerous is to examine the webs they create. Here are a few characteristics of widow spider webs:

  • The webs created by widow spiders are made of strong threads. When you snap a thread, it might make a plucking noise. That's how strong it is.
  • Widow spiders don't make pretty webs. Their webs are tangled. This is for utility. A widow spider is looking to capture a large insect or small mammal. While it can eat flies, their webs aren't designed to capture tiny insects.
  • You'll find black widow spider webs near the floor of storage areas or in your garage. Outside, they're likely to be found close to the ground in sheltered locations such as under a deck, in a brush pile, or under a stack of scrap wood.


Both the brown widow and the black widow start out as brown spiders. While the brown widow nymph looks a lot like what the adult will look like, a western black widow spider nymph looks nothing like an adult female spider of the species. If you see a spider with a bulbous abdomen that is brown with white, red, or yellow stripes, you might be looking at a widow spider nymph.

Adult Females

When a female widow spider reaches her adult stage, she will look more like what you would expect her to look like. Females have the recognizable hourglass pattern on the bottom of their abdomens. Brown widows tend to be tan with an orange hourglass, but there is some variation. A brown widow spider can be so dark that you might think it is a black widow. It may also have an hourglass symbol that is dark enough to look like it might be red. Female black widows are black and shiny with a bright red hourglass symbol. They're usually fairly easy to identify.

Male Widow Spiders

If you see a male widow spider, you might not realize it. They don't have the same recognizable coloration and markings as the females and they are much smaller. It is certainly helpful to be able to pick out a male black widow or brown widow in a lineup of spiders, but there are no easily identifiable traits to point out.

We highly recommend doing some image searches and looking at photos of black and brown widow spider nymphs. If you do, keep in mind that there is a lot of variation, so looking at one picture isn't going to be enough to help you positively identify these dangerous spiders on your property.

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