The female is the easiest to recognize--and the most dangerous. She is coal-black, with a spherical abdomen and a red hourglass-shaped mark on her belly.
[header] How to get rid of black widow spiders [title] Recognize a black widow spider. [step] Black widow spiders are found across the u.s and canada, and in other temperate regions around the world. They are the most venomous spiders in north america.