All three species of the black widow spider that can be found in the U.S. have been established in the Hawaiian islands as ...

Biologists in regions of the Southern U.S. noticed that the iconic black widow spider — known for its telltale hourglass mark and venomous bite — often disappeared when a different species ...

The average brown recluse spider is much smaller than the average black widow spider. For example, brown recluses grow ...

The noble false widow spider (Steatoda nobilis), already considered one of the world’s most invasive arachnids, has ...

There are several species of widow spiders in the United States, including the northern and southern black widow and the red widow. The brown widow spider is considered one of the least dangerous.

There are two species of “medical concern” in the state, according to the Washington State Department of Health, the black widow and the yellow sac spider.Both are common in Eastern Washington ...