Spiders in California

Spiders found in California include 50 unique species from 735 confirmed sightings based on contributions made by Spider ID members. It is important to remember that spiders seen in California are not bound by the territorial lines decided on by humans, therefore their distribution is subject to change. Occasionally, spiders can be found well outside of their known range due to being intentionally or accidentally transported by humans in cars, luggage, and other belongings.


50 Species Found in California

California Sightings
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735 spider sightings have been made in California by contributing members. Consider submitting confirmed sightings of your own.

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Picture of Latrodectus geometricus (Brown Widow Spider) - Lateral Enlarge Picture
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Picture of Badumna longinqua (Grey House Spider) - Dorsal,Exuviae Enlarge Picture
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Picture of Olios giganteus (Giant Crab Spider) Enlarge Picture
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