Each season, female brown widow spiders lay several egg sacs, each with 120 to 150 eggs. The egg sacs are distinctive, with silky spikes projecting from the surface, much like a thistle.

As far as anyone knows for certain, brown widow spiders have only resided in Southern California for a decade or so -- the first in the region was spotted in Torrance in 2003. But a new survey ...

Brown widow venom has bite ... If you crush her, it might release hundreds of tiny, baby wolf spiders in your house. Ticks are related to spiders and scorpions but are actually a kind of mite.

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. When you ...

The brown widow spider, Latrodectus geometricus, is an urban invasive species that generally lives under garbage cans, in fences, and around buildings. This study compared behaviors of the ...

But they seem to be no match for their aggressive non-native cousin, the brown widow. Scientists at the University of South Florida have recently discovered that brown widows ruthlessly target and ...

Brown widow spiders (Latrodectus geometricus) don’t seem to get along with their cousins from the same genus, and over the past few decades scientists have observed brown widow spiders ...

Parental care might help invasive brown widow spiders spread. Valeria Arabesky and colleagues at Ben-Gurion University of the Negev found that invasive brown widow spiders effectively defend their ...