If you’ve noticed a spider with long, thin legs dangling in your basement, garage, or crawl space, you’re likely looking at a cellar spider.
These arachnids are easy to spot but often misunderstood. Many homeowners in Louisiana wonder: Are cellar spiders dangerous or beneficial?
Let’s separate fact from fiction so you can feel more confident the next time you see one.
Key Takeaways
• Cellar spiders are not dangerous to humans and rarely bite.
• Their spider venom is too weak to affect human skin.
• They help reduce other small insects, such as crane flies, wasps, and even spiders.
• Professional pest control can help if messy webs become a nuisance.
What Is a Cellar Spider?
The common name “cellar spider” refers to several species in the family Pholcidae. The most well-known species, Pholcus phalangioides, is recognized for its thin legs and small cephalothorax. Despite their spooky appearance, these true spiders are harmless.
Often mistaken for harvestmen or daddy long-legs spiders, cellar spiders are different. Harvestmen (also called daddy longlegs) aren’t even spiders; they belong to a distinct group of arthropods and don’t produce venom or spin webs.
Are Cellar Spiders Poisonous?
Their Venom Glands Aren’t a Threat
Cellar spiders do have venom glands, like most kinds of spiders, but their toxicity is extremely low. Unlike black widow or brown recluse spiders, cellar spiders can’t inject venom that affects humans. Their short fangs can’t even pierce human skin.
Cellar Spiders Rarely Bite
Even if you accidentally disturb one, cellar spiders are unlikely to bite. These long-bodied cellar spiders stay in one spot, waiting for food sources to come to their cobwebs. They avoid confrontation and are much less active than wolf spiders, which are hunters.
Are Cellar Spiders Beneficial?
Yes, they are. Cellar spiders eat a variety of pests you’d probably prefer not to have around.
What Do Cellar Spiders Eat?
They feed on:
• Mites
• Crane flies
• Wasps
• Small insects
• Other species of spiders
In Louisiana, where bugs thrive in warm, humid weather, having a few cellar spiders in basements or crawl spaces can help with natural pest management.
Do Cellar Spiders Multiply Quickly?
Cellar spiders lay egg sacs in their webs, which may make it seem like an infestation is coming. However, they are not an invasive species, and their growth depends on available food sources.
You might spot spiderlings near webs in low-traffic spots like under stairs or near unused furniture. Still, they don’t pose any real danger to you, your family, or your pets.
Are Their Webs a Problem?
The most common complaint about cellar spiders isn’t the spiders themselves; it’s the spider webs. Their webs can accumulate in corners and appear messy, especially in basements and garages. If left alone, they may make a home feel neglected.
If you’re seeing lots of cobwebs or egg sacs, it may be time to take action to get rid of cellar spiders before they multiply.
How to Get Rid of Cellar Spiders
If their presence has gone from interesting to irritating, there are safe ways to remove them.
Natural Prevention Tips
• Use a dehumidifier in areas prone to dampness, such as crawl spaces.
• Sweep and vacuum regularly to remove webs and egg sacs.
• Seal cracks and crevices to reduce food sources and entry points.
• Limit lighting that attracts food sources, such as moths and flies.
These steps reduce both the spiders and the pests they rely on as food.
When to Call Pest Control
While cellar spiders aren’t harmful, not everyone wants to share their home with them. If the number of spiders and webs keeps growing, pest control services like LaJaunie’s can help.
We target long-bodied cellar spiders in key areas without disturbing beneficial arthropods. Whether you’re in Thibodaux, Houma, or Baton Rouge, our team offers spider control with safe and effective pest management strategies tailored to your home’s specific needs.
Why Choose LaJaunie’s for Spider Control?
At LaJaunie’s Pest Control, we know that not every spider needs to be removed, but when spider webs and pest issues start affecting your space, we’re here with a plan. Our pest control services are designed for Louisiana homeowners, with treatment options for basements, garages, and crawl spaces.
Just give us a call and we’ll answer your queries. We offer same-day service, Saturday appointments, and a satisfaction guarantee. You won’t find a more responsive pest management team in southern Louisiana.
FAQs
Are cellar spiders dangerous to humans?
No. Cellar spiders are not dangerous, even though they have venom glands. Their venom has very low toxicity and can’t harm human skin. Bites are sporadic.
How can I get rid of cellar spiders in my home?
Use a vacuum to remove spider webs and egg sacs. Reduce humidity with a dehumidifier and seal cracks where insects may enter. For ongoing issues, call for professional pest control.
Do Cellar Spiders Kill Other Pests?
Yes. Cellar spiders eat small insects, including crane flies, mites, and even other spiders. They’re beneficial if you don’t mind their presence and can help keep your home pest-free.
