Black Widow Spider
Latrodectus mactans
Scientific illustration for identification purposes
Overview
Black widow spiders are venomous spiders with medically significant bites. Females are recognizable by their shiny black body and red hourglass marking. They are not aggressive but will bite if disturbed or trapped. Their venom affects the nervous system.
How to Identify
- Shiny, jet-black body
- Red hourglass marking on underside of abdomen
- Rounded, globe-shaped abdomen
- Females much larger than males
- Messy, irregular cobwebs
Behavior
Black widows are not aggressive and bite only when disturbed or trapped. They build messy, irregular webs in protected locations. They are nocturnal and reclusive.
Habitat
Found in dark, protected areas including woodpiles, sheds, garages, meter boxes, under stones, and in cluttered storage areas. Webs are built near ground level.
Diet
Prey on insects and other small arthropods captured in their webs.
Reproduction
Females can produce multiple egg sacs containing 250-750 eggs each. Spiderlings disperse by ballooning. Females may live 3 years.
Distribution in the Southern U.S.
Common throughout Texas, Oklahoma, Louisiana, and Mississippi.
Regional Notes
Black widows are particularly common in the South and thrive in the warm climate. They are frequently found in outdoor areas and garages.
Signs of Infestation
- Messy, irregular cobwebs near ground level
- Shiny black spider with red marking
- Webs in protected, cluttered areas
- Egg sacs (tan, papery balls) in webs
- Webs in meter boxes, woodpiles, sheds
Prevention Tips
- Wear gloves when working in cluttered areas
- Shake out shoes and clothing before wearing
- Remove clutter from garages and sheds
- Stack firewood away from house
- Use caution when reaching into dark areas
- Regular pest control to reduce prey
When to Contact a Professional
Contact a professional for comprehensive spider control if black widows are found in or around your home. Seek medical attention if bitten.
Romex Pest Control provides professional black widow spider control services across Texas, Oklahoma, Louisiana, and Mississippi.
Learn about our black widow spider control servicesFrequently Asked Questions
How dangerous is a black widow bite?
Black widow venom affects the nervous system and can cause severe pain, muscle cramps, and other symptoms. While fatalities are rare with modern medical care, bites require medical attention, especially for children and elderly.
Where are black widows commonly found?
Black widows prefer dark, protected areas near ground level including woodpiles, meter boxes, under stones, in sheds and garages, and in cluttered storage areas.
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