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Like all widow spiders, this venomous arachnid has a distinctive orange hourglass mark on the underside of its abdomen. In addition, the small biting spider has yellowish and black banded legs. Seeing a spider in your home may give you the heebie-jeebies, but they are common in California homes. For the most part, these house spiders in California are harmless, but it helps to be able to identify these eight-legged creatures when you see one. This is a list of common house spiders found in the state of California.
Hobo spider
This common house guest is typically dark brown or orangish-brown in color and has stripes on its legs. They can be found in dark, quiet spaces like cabinets and undisturbed rooms like attics, basements, and garages. Despite their creepy appearance, spiders act as effective pest control, eating insects and mites.
Brown Spiders
Brown spiders, also known as fiddle-back or violin spiders, are a part of the Sicariidae family. Some are harmless, but this group of spiders also includes the brown recluse, the most dangerous spider of the Loxosceles species. We’ll start by admitting that most insecticides won’t touch many spiders. They simply don’t stay in contact with any pesticide long enough to absorb a lethal dose. Like most spiders, hobo spiders will eat insects and in this way, they are actually beneficial. There are no reports of them refusing any insect that is offered to them.
Carolina Wolf Spider (Hogna carolinensis)
The large arachnid has a sizable egg-shaped abdomen, a large head area, and long, robust hairy legs. These characteristics give the spider the appearance of a tarantula. However, it’s a member of the funnel-web spider family Nemesiidae. Also called the daddy long-legs spider, the long-bodied cellar spider is a common arachnid found in Californian homes. The brown spider has a slender, tear-shaped abdomen and a small head.
Common House Spiders (With Pictures) – Identification Guide
Common house spiders come in various colors, including brown, yellow, tan, red, black, gray, and white. Their physical features can vary, but they often have an oval or round-shaped abdomen. You may often come across various types of house spiders in your home, but don’t worry – most of them are harmless. Here, we’ll briefly introduce you to some common house spiders that you may encounter.
Most Common House Spiders
They’re nearly identical to hobo spiders except for the prominent bands on their cephalothorax. The giant house spider (Eratigena duellica) is virtually identical to the hobo spider. There is some evidence they may even mate with each other from time to time. The female spider never leaves her web unless forced to, but keeps on adding new layers - old webs can look grey and woolly from constant additions of silk.
Domestic House spiders are not a particularly aggressive species, preferring to retreat when confronted. Brown Recluse Spiders are venomous, but they rarely bite unless provoked. Many times this happens by mistake, when they get caught in bedding or clothing. The best way to avoid an infestation is by reducing clutter in unused areas of the home, in order to minimize possible hiding places. If spiderwebs are visible, use caution before approaching the area, and if you suspect Black Widow spiders, call a specialist immediately. In a home, this can include garages, sheds, barns, basements, and crawlspaces.
Black Widow Toxicity
If you want to make sure your house spiders are pulling their weight, check in and under their webs to see what they've been eating. "Spiders feed on common indoor pests, such as roaches, earwigs, mosquitoes, flies and clothes moths," explains a fact sheet by Bayer CropScience. Not everyone who's afraid of spiders hates them, leading many people to try non-lethal eviction. Perhaps the most common strategy involves trapping a spider in a cup and releasing it outside, where it can presumably return to its natural lifestyle. This is a noble sentiment (and often requires quick reflexes), but as Crawford explains, it may not achieve the desired result if the arachnid is a true house spider. "They usually spend their entire life cycle in, on or under their native building."
Funnel-weaver Spiders
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It ranges from 6 to 12 millimeters in length, with a reddish-brown "head" (the cephalothorax) and a pale, speckled abdomen. It builds funnel-shaped webs, and is known to prey on pest insects inside homes. A brown recluse spider has a yellowish-brown velvety head and oval abdomen. In addition, the six-eyed spider has a distinctive violin pattern on its cephalothorax, making it easy to distinguish from the common house spider.
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Like tarantulas, they spend most of their time in burrows, making them difficult to spot outdoors. However, these tame, harmless tarantula-like spiders are popular pets due to their docile nature. Despite its menacing appearance, the Carolina wolf spider is not aggressive toward humans and will generally only bite if provoked or threatened. Although they look menacing, jumping spiders are not considered dangerous to humans.
The primary names used for hobo spiders are aggressive house spiders and funnel weaver. This name alludes to the distinctive pattern on its cephalothorax, resembling a human skull. Although the spiders aggressively hunt insects and other venomous spiders like the redback spider, they are completely harmless to humans. Of the three venomous species of spiders in California, the western black widow is the species you are most likely to encounter. This black spider lives in proximity to humans and hides in dark corners, under garden debris, or in clothing. Although a spider bite rarely kills, it can cause severe pain and discomfort.
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