Why you have spiders:
Some types of spiders will move indoors, in search of prey and to find secure areas to build their webs. This happens most frequently as the cold weather seasons approach. One inside they may be able to thrive in areas where prey is available such as in basements or crawlspace. House spiders feed on small flies, mosquitoes and small insects. Their webbing can be found in corners and closets, under furniture, or along joints and where the wall meets the ceiling.
Spiders are predatory insects and will paralyze or kill insects (usually flies) with their venom. Normally they live outside and seek protected areas around windows, doors, and eaves. They will at times move indoors, especially during the colder months. Although there are thousands of different types of Spiders found worldwide, only a handful of species are common in our area. And since they are opportunistic predators, their presence in your home or business, may be a clue to other pest infestations as spiders will feed off of other common household pests.
The spider anatomy is made up of 2 body regions, the head and abdomen. They have (8 legs), 4 pairs of legs, most have 8 eyes, but some do have 6. All spiders contain venom, but in our area, only the brown recluse and black widow spiders can be considered dangerous.
Most spiders are nocturnal and in general they will scurry off if frightened, unless they are protecting their eggs or young. During the day, they tend to hide in their web or in cracks or crevices. While most spiders can bite, they usually don't unless provoked.