The Common house spier, sometimes called the American House Spider, is an extremely common spider in North America and South America, as its name suggests. There are several species of this genus, Achaearanea, all sharing many common features. They build their tangled web in secluded locations, which can also house eggs contained in one or more spherical sacs. Their behavior on webs is quiet and efficient. They are generally dull in appearance, with patterns consisting of brown shades for coloration. Their average body size is a quarter-inch long. These traits combined allow the spiders to blend into the background and escape notice.