There are about 1000 species of spiders in the United States. They live everywhere, even inside homes and buildings.
Some species are able to bite humans and inject a venom into the skin.
They are predators, feeding primarily on insects and other arthropods. When feeding, spiders inject a digestive fluid into their prey, then suck up the digested food. They can survive for long periods of time without feeding. Some spiders have been kept alive for over two years without feeding. Because spiders feed entirely on living insects or other animals, they may actively search for their prey, hide and wait for them to pass, or build webs to trap flying insects.