The western black widow. This spider is usually a glossy black, although it can appear to be brown or dark purple. It may have the red hourglass shape on its underside, but it might have two ...

Brown widow spiders are believed to have originated in either Africa or South America but they have spread all over the world. They were first seen in Florida in 1935.

Brown widow spiders, which are invasive to North America, are wiping out black widow populations in the U.S. by aggressively attacking them for no clear reason, a new study shows.

Brown widow spiders are believed to have originated in either Africa or South America but they have spread all over the world. They were first seen in Florida in 1935.

Black widows are vanishing from certain regions of the U.S. Scientists found that a competitor, the brown widow, may largely be to blame for the iconic arachnid's decline.

Brown widow spiders are believed to have originated in either Africa or South America but they have spread all over the world. They were first seen in Florida in 1935.

Brown widows — a closely related species — arrived in Florida around 1935, probably from South Africa. A single mother produces multiple egg sacs and potentially thousands of spiderlings.

When spotting the difference between brown and black widows, there are a few ways to differentiate between them. Brown widows live in open areas while black widows hide in dark corners and crevices.

Dos and don'ts if you're bitten by a venomous spider or rattlesnake. The Mayo Clinic's snake bite advice is similar to that of spider bites. In either case, do: Call 911/get immediate medical help.