Brown widow spiders are venomous, but their bites are considered much less dangerous than other venomous spiders.

Higgins notes the venomous brown widow has been the most observed spider in Los Angeles County on the community science platform iNaturalist since Sept. 1, although there are also a few species of ...

One species particularly hard hit is the California trapdoor spider--an arachnid engineer that digs out a 6- to 10-inch burrow ... The spiders, once common in Southern California, are now a ...

A researcher reports the discovery of 33 new trapdoor spider species from the US. Most species are from California, ... known only from the Anza Borrego Desert State Park in southern California; ...

In fact, each of the three sea spider species collected for the study were from different areas off the coast of Southern California and Alaska — a clue that the populations are highly localized.

The population of the Joro spider has been growing in parts of the southern and eastern U.S., and some researchers think they will eventually spread to much of the continental U.S.

An unnamed spider species lurks in the sand dunes of Monterey County’s Moss Landing State Beach and UC Davis scientists need your help naming it. UC Davis Professor of Entomology and Nematology Jason ...