The southern black widow. This spider has a shiny, black, globe-shaped abdomen. You’ll know it by the red hourglass mark on the underside.
The northern black widow. You’ll notice a row of red spots down the middle of the upper surface of its abdomen. It also has two crosswise bars on the underside. Just to make things interesting, the markings can also be yellow or white. The spider may be brown or have red legs.
