The yellow sac spider, though often not yellow, are named for the small cocoon-type webs or silk sacs they weave and sleep in. The yellow sac spider is found throughout the Pacific NW, including eastern Oregon. These spiders are a growing nuisance for homeowners.

General Information

Yellow sac spiders are the common source of spider bites in homes. Yellow sac spiders frequent shrubs, trees, leaf litter, debris piles, and other similar habitats. In their nocturnal quest for prey, they may enter homes through poorly fitting screens, under doors, and through any small openings in foundations or rooflines.

Signs of Infestation

Yellow Sac spiders derive their name from the sac of silk they produce daily for resting. Indoors, these small, white, paper-like sacs are often found along ceilings and corners, or behind pictures and shelves. This spider nests in undisturbed locations like corners, ceilings, around doorframes. Outdoors, this spider is found in bushes under leaves.

In summer months sac spiders are mainly hunting outside, moving all over bushes and exterior siding.   As winter approaches and temperatures fall, sac spiders may enter homes to keep warm and find prey.

Signs of an Infestation include:

  • Discovering the yellow sac spider retreats in corners or on ceilings or other undisturbed areas.
  • Spotting tiny spiderlings hunting at nightfall often indicates multiple spiders.
  • Waking up with unexplained bites on your body could be due to a yellow sac spider infestation.
  • Finding these pests crawling on your walls or along window sills at night.

To prevent a yellow sac spider infestation, prevention is key. Inspect your home or premise and seal cracks and crevices around doors, windows and entry points with good quality caulking. Keeping your home or business clean on a regular basis can help eliminate their food source (little insects). Yellow sac spiders like to hide in clothing or laundry, and sometimes bites occur when you put on clothes they are hiding in.

Yellow Sac Spider Bites

If you wake up with a spot that is red, itchy, and inflamed, you may have been bitten by a yellow sac spider. The yellow sac spider bite is similar to that of the brown recluse or black widow, but less severe. Some people do not react to their venom at all, while others have an allergy-like reaction. While yellow sac spiders are not harmful to most, if you have a severe allergy, they can be dangerous.

As they easily pierce the skin, their bite is initially as painful as a wasp bite or bee sting. Bites from the yellow sac spider are rare, but can occur when the spider is trapped against the skin. In addition to being painful, they can cause redness and a burning sensation. The venom causes swelling and a slow healing with broken, ulcerated sores or blisters around the bite site. These sores will begin to heal after a few days. Symptoms lasts a few hours or a day or two at most.

How Altus Pest Control Can Get Rid of Yellow Sac Spiders

The first step to treat this spider is to remove its webbing, seal cracks, and fix screens to eliminate entry points. Controlling other insect populations inside and around the exterior of your home will help reduce attractiveness of spiders to your house. A professional barrier treatment will help maintain total insect control.

If you have a house spider infestation that you urgently need removed, Altus pest control can help. Our pest control specialists use the latest spider control methods to clear them and keep them out of people’s homes.

For the best solution to a yellow sac spider problem in your home or business, schedule our services. Call us today! (541) 709-5033

Say Goodbye to Yellow Sac Spiders in Your Home