Spiders in Arizona: Species, Risks & Control
Arizona has hundreds of spider species. Most are harmless — but two require immediate attention. Here's what you need to know.
Common Spider Species in Arizona
Most Arizona spiders are beneficial predators. These are the species our technicians encounter most often in and around homes.
Black Widow
Latrodectus hesperus
Shiny black with a red hourglass marking on the abdomen. Found in dark, undisturbed areas — garages, woodpiles, and outdoor furniture. Venom is neurotoxic; seek medical attention for any bite.
- Where they hide
- Garages, woodpiles, outdoor furniture, low dark corners
- Egg sac
- Round, papery, off-white — each holds 200–900 eggs
- Most bites occur when the spider is accidentally disturbed
Arizona Brown Spider
Loxosceles arizonica
Light to dark brown with a violin-shaped marking. Reclusive and rarely bites unless disturbed. Venom can cause tissue necrosis in severe cases.
- Where they hide
- Closets, stored boxes, behind furniture, wall voids
- Egg sac
- Flat, disc-shaped, loosely woven
- Often confused with the brown recluse, which is rare in AZ
Wolf Spider
Hogna carolinensis
Large, hairy, fast-moving. Does not build webs — hunts prey on the ground. Bite is painful but not medically significant for healthy adults.
- Where they hide
- Ground level — baseboards, garages, closets, under furniture
- Egg sac
- Carried attached to the spinnerets of the female
- Females carry spiderlings on their back after hatching
Desert Tarantula
Aphonopelma chalcodes
Arizona's largest spider — up to 4 inches. Docile and rarely bites. Venom is mild. Often seen crossing roads in fall during mating season.
- Where they hide
- Burrows in desert soil, under rocks, near foundations
- Egg sac
- Silken sac sealed inside the burrow
- Males wander in fall — this is normal seasonal behavior
Wolf Spiders: Common Questions
Where Spiders Hide in Arizona Homes
Spiders seek undisturbed, dark areas with access to prey. These are the most common harborage points.
Garages, storage rooms, and closets
Dark, undisturbed spaces with easy access to insects — prime black widow territory.
Woodpiles, debris, and outdoor furniture
Exterior harborage sites where black widows and wolf spiders establish webs.
Attics, crawl spaces, and wall voids
Rarely disturbed areas where spiders breed and overwinter.
Cardboard boxes and stored clothing
Black widows hide in folds and corners — always shake out stored items.
Around door frames, window frames, and exterior lights
Lights attract insects; spiders follow. Common web-building sites.
Under sinks and in damp utility areas
Moisture attracts prey insects, which attract spiders.
Warning Signs of a Spider Problem
Most spider sightings are isolated. These signs suggest an established population that warrants professional treatment.
Multiple webs in corners, along baseboards, or in undisturbed storage areas
Webs in multiple rooms suggest an established population, not a single wandering spider.
Black widow webs — irregular, tangled, and low to the ground in dark areas
Black widow webs feel sticky and strong — unlike the delicate orb webs of harmless species.
Egg sacs attached to webs or surfaces — each can contain hundreds of spiderlings
A single egg sac can produce 200–900 spiderlings. Remove them before they hatch.
Frequent spider sightings indoors, especially in bedrooms or living areas
Daytime sightings in living areas often indicate a large population in harborage areas.
How to Reduce Spiders in Your Arizona Home
Seal gaps around doors, windows, and utility penetrations to reduce entry points.
Focus on gaps around pipes, dryer vents, and door sweeps — common entry points.
Remove woodpiles, debris, and clutter from around the foundation.
Keep woodpiles at least 20 feet from the home and off the ground.
Replace white outdoor lights with yellow bug lights — white light attracts insects that attract spiders.
Yellow lights reduce the insect population that draws spiders to your exterior.
Reduce clutter in garages and storage areas where spiders establish harborage.
Spiders establish harborage in undisturbed areas — regular cleaning disrupts this.
Inspect shoes, gloves, and stored clothing before use — black widows hide in these items.
Black widows are most active at night and hide in dark, tight spaces during the day.
When to Call a Professional
If you're finding black widows or brown spiders inside the home, or if spider populations are high, professional treatment is the safest and most effective option.
- You've found black widows inside the home or in areas used by children or pets
- You're finding multiple egg sacs — each can produce hundreds of spiderlings
- Spider activity is high despite DIY treatments
- You have a high insect population that is attracting spiders
- You're uncomfortable handling spider removal yourself
Elite Pest treats interior harborage sites, the perimeter, and exterior areas where spiders shelter — reducing both spider populations and the insect prey that sustains them.
View Spider Treatment Services →Frequently Asked Questions
Keep Spiders Out of Your Home
Elite Pest serves Gilbert, Chandler, Mesa, Phoenix, and the entire East Valley. Same-day service available.