The following creatures are examples of spiders in California:
black widow spider
brown widow spider
false black widow spider
yellow sac spider
orb weaver spider
A few types of venomous spiders can be found in California. These spiders are the black widow spider, brown widow spider and yellow sac spider, along with the desert recluse spider and the Chilean recluse spider (both the desert recluse and Chilean recluse are in southern California).
The black widow spider carries poisonous venom that creates fever and illness in adults and can cause severe injury and even death to infants and small animals. It hides in water meters, attics, garages, basements, tool sheds, air conditioning units… pretty much anywhere it can be out of sight.
House spiders build irregular, tangled webs to catch their prey. You may find cobwebs in ceiling corners, on window sills and attached to indoor fixtures like lighting or wall décor. Spiders are also found inside sheds, garages and barns and near outdoor lights that attract bugs at night. The main three places you will find spiders are:
In storage areas-
A cluttered basement, garage or attic is a favorite hiding place for arachnids. Spiders hide in quiet, undisturbed locations. Keeping a clean and clutter-free storage area can prevent spiders from setting up house, in your house.
Some spiders hide in two places; in one spot during the day and another at night. Hiding underneath furniture is a favorite hang-out. Run your vacuum under your furniture regularly to get rid of them.
Under the kitchen or bathroom sink-
Spiders need water to survive so you can often find them hiding in dark places near your plumbing. Keep under-sink areas organized and clean to keep spiders at bay.Other favorites hiding places are stairwells, garages, crawl spaces, closets and underneath stairs.