Brown Recluse vs Common House Spider in Mobile — How to Tell Them Apart

Mobile has dozens of spider species — most harmless, some genuinely dangerous, almost all misidentified. The big confusion: is that brown spider in your garage actually a brown recluse, or just a southern house spider that looks similar? Here’s the honest field guide.

Not sure what you’re looking at? Get matched with a licensed Mobile exterminator Enter your ZIP code and our 24/7 dispatch line connects you with a licensed, insured Alabama exterminator in our network who serves Mobile and Baldwin County. A real person answers — describe the spider and where you found it, and you’ll be routed to the right pro. Availability varies by provider and location. → Enter your ZIP to get connected

Why this matters

Brown recluse spider bites (Loxosceles reclusa) can cause necrotic skin lesions and require medical attention. But the vast majority of “brown recluse” sightings in Mobile are misidentifications. Multiple peer-reviewed entomology studies (Vetter et al., University of California Riverside) have shown that civilian-reported brown recluse sightings in the Southeast are correct less than 10% of the time. Knowing what you’re actually looking at saves money on unnecessary treatment and avoids medical panic over a harmless bite.

Brown recluse — actual identification markers

A real brown recluse has SIX distinct features. All six must be present for a positive ID:

1. Six eyes arranged in three pairs (most spiders have eight). Look with a magnifying glass.
2. Violin-shaped marking on the cephalothorax (the head/back area, not the abdomen). The “neck” of the violin points toward the abdomen.
3. Uniform light to medium brown coloration — not striped, not banded, not patterned on the legs.
4. Body length 1/4 to 3/8 inch (legs not counted).
5. Smooth, hairless legs — long and even.
6. No noticeable spines or hairs on the body.

If the spider has stripes, banded legs, hairy legs, or eight eyes — it’s not a brown recluse.

Common Mobile spiders that get misidentified as brown recluse

Southern house spider (Kukulcania hibernalis) — the most common brown recluse misidentification in Mobile. Lives in garages, sheds, and dark corners. Larger than brown recluse (3/4″+), males are brownish, females are darker. Builds messy radial webs. Genuinely harmless.

Wolf spider (Lycosidae) — large, fast-moving, brown with darker stripes. Carries egg sac on abdomen. Visible eight eyes. Genuinely harmless to humans despite intimidating appearance.

Cellar spider (Pholcidae) — long thin legs, small body, “daddy long-legs” appearance. Builds messy webs in basement corners. Harmless.

Common house spider (Parasteatoda tepidariorum) — small, brown, builds tangled webs in ceiling corners. Harmless.

Where do you actually find brown recluse in Mobile?

Brown recluse populations in Mobile and Baldwin are present but localized. They prefer:

• Undisturbed dark areas: behind unused furniture, inside stored cardboard boxes
• Attics with low traffic
• Crawl spaces with dry conditions
• Inside shoes, gloves, and clothing that’s been stored
• Behind picture frames

They do NOT prefer the kitchen, bathroom, or any frequently-disturbed area.

What to do if you find one

If you have a positive brown recluse identification (all six markers):

1. Don’t panic — they bite only when pressed against skin
2. Don’t smash it on yourself (obvious, but worth saying)
3. Capture or photograph for confirmation
4. Schedule pest control treatment focused on hiding spaces

If you’ve been bitten and have necrotic tissue, see medical care — but bring the spider (alive or dead) for ID. Most “brown recluse bites” presented in Mobile emergency rooms are MRSA, lyme tick bite, or another skin issue.

Why DIY identification gets it wrong

The violin marking IS visible on several other harmless brown spiders. The “brown body” criterion describes hundreds of species. People see “brown spider, kind of looks like a violin” and conclude brown recluse. Without a magnifying glass and the eye-count confirmation, identification is unreliable.

Treatment options

Pricing varies by provider and by the extent of the infestation, but here’s what the exterminators in our network typically charge for spider treatment in Mobile and Baldwin County — get an exact quote from the pro you’re connected with:

• Inspection + spot treatment: low-to-mid hundreds for confirmed brown recluse populations
• Whole-home spider treatment: mid hundreds (covers wolf spiders, cellar spiders, house spiders too)
• Annual prevention as part of a quarterly plan: typically included in mid-to-high-hundreds-per-year pest control plans

Full pricing in Pest Control Cost Guide for Mobile, AL.

Prevention

• Declutter garages, attics, sheds
• Shake out shoes and gloves before wearing
• Store clothing in sealed plastic bins
• Seal cracks around windows, doors, and utility penetrations
• Maintain perimeter pest control (reduces the insects that spiders eat)

Related Mobile pest references

• Complete Pest Control Guide for Mobile, AL
• Pest Control Cost Guide — Mobile, AL
• Quarterly Pest Control Plan — Mobile
• Quarterly vs Monthly Pest Control

Think you have a confirmed brown recluse? Get matched with a licensed Mobile exterminator Enter your ZIP code and our 24/7 dispatch line connects you with a licensed, insured Alabama exterminator in our network who serves Mobile and Baldwin County. A real person answers — describe what you found and where, and you’ll be routed to the right pro. Availability varies by provider and location. → Enter your ZIP to get connected

MobileAlabamaExterminators.com is a dispatch service. We connect callers with licensed Alabama exterminators. We are not a licensed pest control company. The disclaimer in our site footer and our 24/7 dispatch caveat apply to this page.

Spiders indoors usually mean prey indoors — if roaches are what they’re hunting, start with cockroach control in Mobile, AL and cut off the food supply.