The Southern Black Widow Spider (Latrodectus mactans) is one of the most recognizable spiders in North America. It is well known for its glossy black body and the distinctive red hourglass marking on the underside of the abdomen. This spider belongs to the widow spider group within the family Theridiidae.
Identification
Female black widows measure about 1/2 inch long excluding legs and have shiny black bodies. The red hourglass marking on the underside of the abdomen is the most distinctive identifying feature. Males are much smaller and lighter in color. Like other spiders, they have eight legs and spin irregular webs.
Distribution and Habitat
Southern black widow spiders occur throughout the southeastern United States and parts of other warm regions. They prefer dark, sheltered areas such as woodpiles, sheds, garages, crawlspaces, and outdoor structures.
Life Cycle and Behavior
Female spiders build irregular webs near ground level where they capture insects and other arthropods. Egg sacs may contain hundreds of spiderlings that hatch and disperse.
Pest Status
Black widow spiders are medically significant because their venom can cause painful symptoms in humans. Bites are uncommon but may require medical attention.
Prevention
- Reduce clutter in storage areas.
- Wear gloves when handling firewood.
- Seal cracks and gaps in structures.
Control
Removal of webs, reduction of insect prey, and professional pest control services may help manage infestations.