Spiders are found across the world and have adapted to almost every habitat. Many spiders like moist, damp areas such as basements and crawl spaces, but others prefer dry, warm areas such as air vents and upper corners of rooms. While some species are herbivores, most are predatory. Most spiders detect prey through vibrations, although some are active hunters with sharp vision. They liquidize their food with enzymes and do not have true “jaws”. A minority of species form communities. These societies range from toleration to cooperative hunting and sharing of food.

Spiders will typically only bite humans in self-defense and their venom usually has no more effect than a mosquito bite or bee sting. Some of the more dangerous spiders, such as the black widow or recluse spiders, are quite shy and will only bite when threatened. In any case, it is important to have a professional handle any removal of spiders.