Integrated Pest Management · Agriculture and Natural Resources
University of California
Spiders are mostly beneficial because they are predators of insects and other arthropods, although many people fear them. Among the poisonous spiders, only the widow spiders commonly occur in California. Spiders that might seriously injure people generally spend most of their time hidden. The spiders commonly seen out in the open during the day are unlikely to bite people.
- Common garden spiders
- Black widow and other widow spiders
- Brown recluse and other recluse spiders
- Hobo spider (Revised)
- Zoropsis spider
Related or similar species
- To learn about how spiders are beneficial in the landscape and garden, see the Natural Enemies Gallery.