Sign-in to Account
Call Us

(855) 948-5816

aptive_pest_control_lockup-white

Find Service Area

What Are the Signs of a Black Widow Infestation?

Written by Aptive Pest Control July 24, 2024

Sharing your living space with spiders isn’t unusual, but encountering a black widow spider can cause real concern. These arachnids—identified by their glossy black bodies and bright red hourglass marking—are venomous. 

Early detection of a black widow infestation is crucial for the well-being of your household, particularly for young children, older adults, and pets who may be more susceptible to the effects of a bite. 

This guide will equip you with the knowledge to identify black widows, recognize signs of infestation, and take the necessary steps for eradication. 

The Dangers of Black Widows 

A Detailed Close-Up Image Of A Black Widow Spider With Its Red Hourglass Marking On A Wooden Surface, Next To Its Egg Sac.

Black widows are infamous for their venom, which is estimated to be 15 times stronger than a rattlesnake’s venom. While fatalities from black widow bites are rare, the potential consequences can be severe. Bite symptoms can include intense muscle aches and cramps, nausea, vomiting, and difficulty breathing. 

Due to the potential health risks, it’s essential to address a black widow infestation quickly and avoid direct contact with the spiders or their webs. In many cases, getting in touch with professional Exterminators early is the quickest way to ensure your health and safety. 

How to Identify Black Widows 

A Detailed Close-Up Image Of A Black Widow Spider With Its Red Markings On A Wooden Surface, Positioned Next To Its Egg Sac.

What do black widows look like? Here’s what you need to know: 

  • Adult females, the most commonly encountered variety, are typically a shiny black with a distinct red hourglass marking on the underside of their bulbous abdomen.
  • Males are smaller and less frequently seen. They have red and white markings on their abdomens.
  • Young black widows start as orange and white, gradually turning black as they mature.

Black widow webs offer another vital clue. These spiders create messy, irregular webs, often constructed near the ground in secluded areas like basements, crawl spaces, garages, or under objects outdoors. 

Additionally, the presence of an egg sac—a silken pouch containing hundreds of spider eggs—near potential entry points like doorways is a strong indicator of an infestation. 

Signs of Black Widows 

While unexpected spider sightings are a clear sign of a potential problem, there are other subtle indicators to be aware of. 

Unusual webbing in secluded areas, particularly near the ground level, or the discovery of egg sacs warrants immediate action. 

Black widows are shy creatures, and encountering them directly is less common. However, if you do find shed skin—small pieces of brownish or grayish material around potential hiding places—it suggests black widow activity. 

Finally, small, pepper-like droppings near webs or harborage areas can indicate infestation. 

How to Get Rid of Black Widows 

A Detailed Close-Up Image Of A Black Widow Spider With Its Red Hourglass Marking On A Wooden Surface, Positioned Near Its Egg Sac.

If you suspect a black widow infestation in your home, prioritize safety. Avoid direct contact with the spiders or their webs. The most secure and effective course of action is to contact a professional pest control service. They have the expertise and equipment necessary to effectively identify and eradicate infestations. 

Preventing Black Widow Infestations 

The best defense against black widows is a proactive approach. Here are some key steps to prevent these spiders from taking up residence in your home: 

  • Declutter and Clean Regularly: Eliminate potential hiding spots by keeping your home clean and clutter-free. Regular vacuuming and dusting can help reduce spider populations and remove potential prey insects that attract black widows. 
  • Block Entry Points: Inspect your foundation and exterior walls for cracks or holes and seal them to prevent spiders from entering your home.
  • Store Items Strategically: Avoid storing firewood, boxes, or other clutter directly against your home’s exterior. These items create harborage areas for spiders and provide easy access points to your living space.

Think You Have a Black Widow Infestation? 

If you suspect a black widow infestation, don’t attempt to handle the situation yourself. Reach out to a qualified pest control professional to effectively eliminate the infestation. Contact Aptive, we’d love to help. 

Curated articles for you, from our pest experts.

A White Bookshelf Filled With A Vibrant Assortment Of Hardcover Books Arranged Neatly By Color, With Titles In Various Fonts And Sizes Creating A Visually Striking Rainbow Pattern.

Booklice 101: What Are Booklice?

Booklice are tiny, harmless insects commonly found in homes with moisture problems, feeding on mold, fungi, and microscopic organic matter rather than actually damaging books despite their misleading common name. These minute creatures appear suddenly in humid...

Nov 25, 2025

Why Do Bugs Appear in the Bathroom More Than Anywhere Else

You observe disproportionate pest activity in bathrooms compared to other household rooms, noticing insects including silverfish, cockroaches, and drain flies appearing regularly despite cleaning efforts, suggesting these spaces provide uniquely attractive...

Nov 25, 2025
A Close-Up Image Of A Dead Cockroach Lying On Its Back On A Rough Concrete Surface. Its Legs And Antennae Are Curled Upward, And Its Brown Exoskeleton Is Clearly Visible.

Why Dead Bugs Attract More Bugs

You observe clusters of dead insects in corners or windowsills accompanied by live insects including beetles, flies, or ants, suggesting decomposing insects attract additional pest activity rather than simply accumulating passively.  Dead insects release...

Nov 25, 2025
A Detailed Image Of A Basement Laundry And Utility Room With Exposed Wooden Beams, A Washer And Dryer, A Water Softener, Ductwork, And A Water Heater Unit Against A Brick And Wood-Paneled Wall.

Why Do Basements and Attics Host Different Pest Species

You observe distinct pest types in different vertical zones of your home—moisture-seeking insects in basements while overwintering pests concentrate in attics—suggesting these spaces provide fundamentally different environmental conditions attracting...

Nov 25, 2025
Modern Suburban Home With Beige Siding, Dark Shutters, And A Clean Black Roof, Featuring A Well-Maintained Lawn And A Triple Garage Under A Colorful Evening Sky.

Why Do Pests Return After Moving Out of a Home

You vacate a property expecting pest activity to cease without human occupancy, yet observe infestations reestablishing or intensifying during vacancy periods, suggesting pests exploit conditions created by unoccupied structures rather than requiring active human...

Nov 20, 2025
A Group Of Small Potted Plants, Including A Fuzzy Cactus, A Green Succulent, And A Taller Reddish Succulent, Arranged On A Windowsill With Sheer Lace Curtains Softly Filtering Daylight In The Background.

Why Windowsills Become Hotspots for Insect Activity

You observe disproportionate insect activity concentrated on windowsills compared to other household areas, finding dead and live insects including flies, ladybugs, spiders, and various other species clustered near glass surfaces.  Windowsills attract insects...

Nov 20, 2025
A Dimly Lit Indoor Scene Showing A Rainy Window With Water Droplets On The Glass. Two Lit Candles Sit On The Windowsill, One On Each Side, With A Wooden Incense Holder And An Unlit Incense Stick Placed Between Them. The View Outside Is Blurry, Showing Overcast Skies And Faint Outlines Of Trees And Buildings.

How Humidity Levels Influence Pest Survival Indoors

You discover insects concentrated in bathrooms, basements, and other damp areas despite keeping other rooms free of pests, suggesting moisture levels fundamentally determine where certain pest species can survive and establish.  Indoor humidity directly...

Nov 18, 2025
A Bright Indoor Scene Featuring Several Potted Houseplants On And Around An Orange Wooden Cabinet. A Trailing Pothos Vine Climbs The Wall, A Rubber Plant Sits In A Large White Ceramic Pot, And Another Leafy Plant Is In A Patterned Pot Beside Several Books. A Small Elephant-Shaped Planter Holds A Thin-Leaved Plant. Framed Botanical Artwork Hangs On The Wall Above, And Lush Green Leaves From Additional Plants Fill The Right Side Of The Image.

Top 5 Tips for Avoiding Thrips

Preventing thrips infestations requires proactive strategies that address how these tiny pests enter gardens, the conditions that favor their reproduction, and early detection methods that allow intervention before populations reach damaging levels.  Thrips...

Nov 18, 2025
A Close-Up Macro Image Of An Argentine Ant (Linepithema Humile) On A Green Leaf. The Ant’s Segmented Body, Including Its Reddish-Brown Head And Large Black Abdomen, Is Sharply In Focus Against The Blurred Green Background.

Top 5 Most Common Pests to Worry About in the Pacific Northwest

The Pacific Northwest's mild, wet climate and dense urban-forest interface create ideal conditions for numerous pest species that thrive in the region's consistent moisture, moderate temperatures, and abundant vegetation. Homeowners in Washington, Oregon, and...

Nov 12, 2025
A Small Snail With A Light Brown Shell Crawling On A Green Leaf Covered In Water Droplets, With A Blurred Green Background.

Top 5 Most Common Pests in Your Home Garden

Home gardens face constant challenges from insect and invertebrate pests that damage vegetables, flowers, and ornamental plants through their feeding activities, virus transmission, and rapid population growth under favorable conditions. Understanding the most...

Nov 12, 2025

Take back your home with pest control today.