In the past couple decades, researchers have noticed black widow spiders (adult female shown at right) commonly being displaced by the brown widow (adult female at left), a fellow species in the ...

Unlike many other spiders, like the famous black widow ... These common house spiders are brown in color, with some featuring ...

Black widows are notorious spiders identified by the colored, hourglass-shaped mark on their abdomens. Several species answer to the name, and they are found in temperate regions around the world.

The abdomen has a white dash in the middle ... They have smooth bodies and colors ranging from black to dark brown. These spiders retreat inside their tunnels when they feel threatened.

In North America, few types of spiders have bites that cause concern, says Chuang. This includes brown and black widows and brown recluse. Black widows and brown widows are usually found in wood ...