Members of the family Pisauridae, fishing spiders or nursery web spiders, are found in homes located near wooded habitats. These spiders are the largest found in North America, but are not dangerous to humans. Species living in the United States include nine members of the genus Dolomedes. Most species feature white to tan patterns on their backs.
Jumping spiders are part of the family Salticidae. They have short front legs and the best vision among spiders. They seek shelter in houses, barns and sheds during the winter months. Common species of jumping spiders include members of the genus Phidippus, which often are black with red or white patterns, and the genus Platycryptus, which are gray with black spots.
Cellar spiders or daddy longlegs are part of the family Pholcidae, and very common in homes. They feature long, thin legs and build webs in dark places, from which they hang upside down. Cellar spiders are often found in garages, sheds and in dark and humid places in the home, such as cellars and basements. Pholcus phalangioides is a common species in the United States.
The cupboard spider (Steatoda grossa) is an abundant cobweb species in the southern states. The bite can cause skin blistering around the bite site, but it is not fatal to humans. Other species of cobweb spiders found in homes include the common house spider (Parasteatoda tepidariorum), which is also part of the family Theridiidae, featuring spiders with round abdomens. Black widows (genus Latrodectus) have a very toxic bite, which causes a condition called latrodectism in humans. Main symptoms are tachycardia, and severe muscular and abdominal pains.