Common Spiders in Seattle, WA: Identification and Information
Seattle, Washington, like much of the Pacific Northwest, is home to a variety of spider species. While most are harmless and even beneficial, some can cause concern for homeowners. This article will explore some of the most commonly encountered spiders in the Seattle area, providing information on their identification, habits, and potential risks.
Common Seattle Spiders
Hobo Spider
Once widely feared, the Hobo spider (Eratigena agrestis) is now generally recognized as having less medically significant venom than previously thought. These spiders are funnel-web builders, often found in basements, window wells, and around building foundations. They are brown in color and can be identified by their leg span, which can reach up to two inches. You can read more about the Hobo Spider on Wikipedia.
Giant House Spider
Similar in appearance to the Hobo spider, the Giant house spider (Eratigena atrica) is another large, brown spider commonly found in Seattle homes. They are known for their impressive speed and large size, often startling homeowners when they dart across floors or walls. Despite their intimidating appearance, they are generally harmless to humans.
Orb-Weaver Spiders
Orb-weaver spiders, such as the Cross Orbweaver (Araneus diadematus), are easily recognized by their large, circular webs. These webs are often found in gardens, yards, and wooded areas. They are beneficial spiders, preying on insects that can be pests to gardens. Their bite is not considered dangerous.
Cellar Spiders
Also known as “daddy long-legs spiders,” cellar spiders (Pholcidae) are very common in homes. They prefer dark, damp places like basements and crawl spaces. Their fragile, tangled webs are often found in corners and crevices. These spiders are generally harmless and help control other insect populations.
Black Widow Spider
While less common than other spiders on this list, Black widow spiders (Latrodectus hesperus) are present in the Seattle area. They can be identified by the distinctive red hourglass marking on their abdomen (though this marking can sometimes be incomplete or absent, especially in juveniles). Black widow bites can be medically significant, requiring medical attention, although fatalities are rare.
What to Do About Spiders
Most spiders in Seattle are harmless and play a beneficial role in the ecosystem. If you find spiders in your home that you’re not comfortable with, consider these steps:
- Seal cracks and crevices in your home’s foundation and around windows and doors to prevent spiders from entering.
- Remove clutter and debris from your yard and around your home’s foundation.
- Use a vacuum cleaner to remove spiders and their webs.
- Consider contacting a professional pest control company if you have a large spider infestation or are concerned about venomous spiders.
Frequently Asked Questions
Are Seattle spiders poisonous?
Most spiders in Seattle are not poisonous, meaning they are not harmful to eat. However, some spiders are venomous, meaning they can inject venom through their bite. The black widow is the only spider in Seattle with venom considered medically significant.
What attracts spiders to my house?
Spiders are attracted to homes that offer food and shelter. Insects, other spiders, damp areas, and dark spaces can all attract spiders to your home.
How do I get rid of spiders naturally?
Natural ways to deter spiders include using essential oils like peppermint, eucalyptus, or tea tree oil, cleaning regularly to remove webs and eggs, and sealing cracks and crevices in your home.
When is spider season in Seattle?
Spider activity often increases in the late summer and early fall as spiders are looking for mates and places to overwinter. This is when you are most likely to see them in your home.
Is a spider bite dangerous?
Most spider bites in Seattle are harmless and result in minor localized pain and swelling. However, a black widow bite can cause more serious symptoms, such as muscle cramps, nausea, and difficulty breathing, requiring medical attention.
Summary
Seattle is home to a variety of spider species, most of which are harmless. Understanding the different types of spiders you might encounter can help you identify any potential risks and take appropriate measures. By keeping your home clean, sealing entry points, and taking preventative measures, you can reduce the likelihood of spider infestations.
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