Parasteatoda tepidariorum, commonly known as the common house spider, is small with a bulbous abdomen and long, slender legs. It typically resides in human dwellings and gardens, spinning tangled webs. These spiders are known for their adaptability, playing a role in controlling insect populations.

Parasteatoda tepidariorum, commonly known as the common house spider, has a native range that includes North America. It is primarily found throughout the United States and parts of southern Canada. The species has also been introduced to other regions globally, including parts of Europe, Asia, and Australia, where it is often found in human dwellings.

The common house spider thrives in temperate climates and is well-adapted to living in human-altered environments. Its preferred habitats include indoor environments such as homes, garages, sheds, and barns, where it finds both shelter and prey. It can also inhabit outdoor environments like gardens and woodpiles, especially in warmer climates.

Parasteatoda tepidariorum occupies an ecological niche as a predator of various small insects and arthropods. It constructs irregular cobwebs in corners and undisturbed areas, using these webs to capture prey. Its presence in human habitats helps control populations of pest insects, making it an important species for maintaining ecological balance within these environments.