Where to find them: There are about 230 species in this family throughout the U.S. and Canada. They cling ... you have an infestation, the common house spider is harmless, so just let them be.

The common house spider, scientifically known as Parasteatoda ... or breathing difficulties (via Nature Conservancy Canada).

Spiders are some of the most common creatures we share our homes with. While they may seem scary at first, most house spider species are harmless and even helpful, keeping pest insects under control.