Black Widow vs Brown Recluse in Texas: How to Tell Them Apart
By the Weatherford PestClear editorial team. Sources are listed at the end.
A black widow is a shiny black spider with a red or orange hourglass on the underside of its round abdomen. A brown recluse is tan to brown with a dark violin-shaped mark on its back and only six eyes. Both live in Texas and both bite only when trapped or disturbed. The Texas Department of State Health Services says antivenom is generally not prescribed for widow bites and no effective antivenom exists for recluse bites, so call the Texas Poison Center Network at 1-800-222-1222 if you think you were bitten.
What the data says
| Fact | Detail | Source |
|---|---|---|
| Medically significant spiders in Texas | Only two groups: recluse spiders and widow spiders | Texas A&M AgriLife Extension |
| Species named by the state | Black widow (Latrodectus mactans) and brown recluse (Loxosceles reclusa) | Texas DSHS |
| Recluse species recorded in Texas | Five | Texas A&M AgriLife Extension |
| Bite calls in Texas | About 300 brown recluse bite calls and 150 to 200 black widow bites a year, per a Texas Panhandle Poison Center medical director | KVII ABC 7 Amarillo |
| Brown recluse range | Southeastern Nebraska to central Texas, east to northwestern Georgia | Landscape Architect magazine |
| Misdiagnosis | Florida poison centers logged 844 brown recluse bite reports in six years, though extensive searches found none established there. A Kansas family collected 2,055 recluses in six months with no bites in eight years | Isbister and Fan research, as reported by Landscape Architect |
The last row matters. Recluse bites are overdiagnosed, and many sores blamed on spiders turn out to be something else.
Black widow vs brown recluse: side by side
| Feature | Black widow | Brown recluse |
|---|---|---|
| Color | Shiny jet black (females) | Golden to tan or dark brown |
| Size | About 1.5 inches including legs | Medium; legs spread roughly 1 inch |
| Key marking | Red or orange hourglass on the underside of the abdomen | Dark violin or fiddle-shaped mark on the front body section |
| Eyes | Typical eight-eye pattern | Six eyes in three pairs |
| Males and young | Smaller, brown, less distinctive | Similar to adults, smaller |
| Web | Messy, irregular, low to the ground | No catching web; hunts at night |
| Where found | Woodpiles, boxes, meter boxes, under eaves, outdoor toilets, undisturbed corners | Closets, garages, attics, stored boxes, shoes, cracks in low-traffic areas |
| Bite | Pain that can spread, with cramps and nausea | Often unnoticed at first; can range from an itchy bump to a wound |
The eye pattern is the most reliable clue for a recluse, but you need a close look at a spider you should not be handling. A photo is safer than a close inspection.
Common look-alikes
| Spider | What it looks like | Why it gets mistaken | Risk |
|---|---|---|---|
| Wolf spider | Large, hairy, brown with stripes, runs on the ground | Mistaken for a brown recluse | Not medically significant |
| Cellar spider (“daddy longlegs”) | Pale, small body, very long thin legs, messy corner webs | Mistaken for a recluse because of color | Harmless to people |
| Grass spider | Brown, funnel web in grass and shrubs | Mistaken for a recluse | Not medically significant |
| Brown widow | Tan to brown with an orange hourglass | Mistaken for a recluse or black widow | A widow species; AgriLife lists it as probably present in Texas |
Where they hide around a North Texas home
The Texas DSHS lists woodpiles, boxes, outdoor toilets, meter boxes and eaves as typical black widow spots. Texas A&M AgriLife Extension puts recluses in stored boxes, stacks of firewood and cracks in rarely disturbed areas. For Parker County homes, that means:
- Outside: meter and irrigation boxes, woodpiles, outdoor furniture, sheds, barns and eaves.
- Inside: garages, closets, attic access, stored cardboard boxes, shoes and clothing left on the floor.
Most bites happen by accident, when a spider is trapped against skin in a shoe, glove or stack of stored clothing.
Bite symptoms
- Black widow: pain that can spread, abdominal or chest muscle cramping, nausea and tremors. A Texas poison center medical director says the chest and abdominal pain can be especially problematic for older people.
- Brown recluse: you may not know you were bitten. Some bites are a mild itchy bump. The DSHS notes recluse venom can cause local or whole-body reactions, and some bites develop into a slow-healing wound.
What to do if you are bitten
- Wash the area with soap and water and apply a cool compress. Do not cut, suck or tie off the area.
- If it is safe, photograph the spider or keep it in a sealed container.
- Call the Texas Poison Center Network at 1-800-222-1222. The DSHS says first aid has limited value and that you should contact the poison center or a doctor.
- Call 911 for severe pain, muscle cramping, a rigid abdomen, trouble breathing, or any serious symptoms in a child or older adult.
- See a doctor for a sore that grows, spreads or does not heal.
Is it really a spider bite?
Many skin problems get blamed on spiders. Research by Geoffrey Isbister and Hui Wen Fan found that people often mistake insect bites, chemical burns, allergic reactions and skin infections for spider bites. The same research noted that wrong assumptions can delay proper treatment. If a sore appears and you never saw a spider, see a doctor instead of assuming.
How to lower your odds of a bite
- Shake out shoes, gloves and clothing stored in garages, sheds and closets.
- Wear gloves when moving firewood, boxes and outdoor furniture.
- Store belongings in sealed plastic bins instead of cardboard.
- Keep firewood and debris away from the house and off the ground.
- Seal gaps around pipes and doors, and trim shrubs that touch the house.
- Vacuum webs and egg sacs, and never squeeze a spider against bare skin.
When to call a pest control company
Call if you find widows repeatedly, suspect a recluse in living spaces, or have heavy clutter you cannot clear. Weatherford homeowners can learn more about spider control in Weatherford or call (817) 555-0199 for a free inspection.