PestDex Details
Black Widow Spider
Latrodectus mactans
arachnid
Venomous spider with medically significant bite. Found throughout Mid-Atlantic in sheltered areas.
How to Identify
- •Glossy black, ½ inch body
- •Bright red hourglass on underside
- •Irregular, tangled web in corners
- •Shy, only bites if pressed or web disturbed
Where Found
Garages, sheds, crawl spaces, wood piles, outdoor furniture. Prefers dark, undisturbed areas. Common in southern MD/VA counties.
Seasonality
Active spring–fall. Hides in protected areas in winter.
Health & Property Risk
Venomous bite causes severe muscle pain, cramping, nausea. Seek immediate medical care if bitten. Antivenom available. Fatalities rare but bites are serious medical event.
Prevention Tips
- •Wear gloves when moving stored items
- •Shake out shoes and clothing left in garage
- •Remove clutter in storage areas
- •Seal cracks in foundation and siding
- •Keep firewood away from house
Treatment Notes
Targeted removal of webs and spiders. Residual spray in harborage areas. Reduce clutter. If bitten: capture spider if safe, seek ER, do not apply ice or tourniquet.