Knowing how to identify black widow spiders at a glance can help to prevent dangerous bites for you and your family. These black spiders have bodies between 1 1/2 and 1 3/8 inches long if you include their leg span. The easiest way to distinguish black widows from other spiders is by the two red marks on their abdomen that have an hourglass shape.
Black widows create messy, irregular webs near the ground less than a foot in diameter. Once the web is complete, the spider will hang upside down, showing off the red hourglass on their abdomen. If you see this spider or one of their webs, it is best to avoid them and call the pros at ProServ Pest Management for assistance with removal.