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Integrated Pest Management · Agriculture and Natural Resources

University of California


Black widow

Black widow.

Flower spider

Flower spider.

Brown recluse

Brown recluse.

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.

Spiders (GENERAL)

En español

Related or similar species