The
common house spider (
Parasteatoda tepidariorum), referred to internationally as the
American house spider, is a
spider species of the genus
Parasteatoda that is mainly indigenous to the
New World, with
P. tepidariorum australis (
common gray house spider) also encountered in some parts of
Myanmar and
Pakistan. American house spiders are
synanthropic and build their
tangled webs in or near human dwellings, often in secluded areas such as between loose walls and behind open doors and attic windows. Statistically, they are the most often encountered spider by humans in North America, and least likely to adopt defensive behavior in their vicinity. Their prey mechanism is similar to that of the other
cobweb spiders: the spider follows disturbances transmitted along the web to entangle and then paralyze its prey, which usually consists of household insects and other invertebrates (often considered as
pests).