Home / Cobweb Spiders / Common House (Parasteatoda tepidariorum)

Common House (Parasteatoda tepidariorum)

Guess what? The American house spider is a popular spider many people meet! Even though its name says “American,” it’s also found in places like Pakistan and Myanmar. These spiders like being near humans. We’ve got a bunch of cool facts about them to share with you. Let’s get started!

Scientific Classification

Common House Spider

Physical Description and Identification

Adults

  • Size: Females measure between 3/16 -5/16 inches, while the males are slightly smaller, ranging from 1/8 – 3/16 inches.
  • Color: Typically dull brown, the males and females sport yellow and orange legs, respectively. Their bodies feature a patterned appearance with various shades, aiding in camouflage.
  • Other characteristics: Females have a spherical abdomen, while males have an elongated one. Both genders have long, skinny legs, but the ankles are adorned with comb-like hairs.
Common House Spider Size

Eggs 

Each female has the capacity of producing approximately 17 egg sacs, which have a brown color and are pear-shaped. 100-400 eggs come out from a single sac that remains with their mother for a certain span.

Common House Spider Egg

Spiderlings

The juvenile spiders hatch within a span of 7 to 10 days after which they gradually disperse.

Common House Spiderlings

The Web

They build tangled and messy webs close to the dwellings of human beings.

Common House Spider Web

Are Common House Spiders Venomous?

Yes, but their venom is not harmful to humans, unlike their relatives, the black widow.

Can Common House Spiders Bite?

While bites are rare, they can occur, typically feeling like a small pinch. Though not dangerous, bites can cause pain, swelling, itching, and redness for a few days. Caution is advised when dealing with these tiny beings.

Common House Spider Bite
American House Spider

Ecological Importance and Behavior of Common House Spider

The American house spider plays a vital role in controlling the population of various insect species, contributing significantly to maintaining ecological balance. They are expert hunters, using their tangled webs to trap prey. Their presence in homes can help in reducing the number of pests, making them an ally in natural pest control.

Natural Predator: These spiders face threats from various predators, including other spider species like pirate and jumping spiders, as well as assassin bugs. These predators help keep the population of American house spiders in check, preventing overpopulation and ensuring a healthy balance within their ecosystem.

Prey-Predator Dynamics: The American house spider is both a predator and prey, sitting in the middle of the food chain. Their role is crucial as they help to control insect populations while providing food for other predators. 

Relationship with Humans: While some may find their presence in homes unwelcome, American house spiders are generally harmless to humans. Their bites are rare and not medically significant. Understanding their role in the ecosystem and their generally benign nature can lead to a more harmonious coexistence.

Quick Facts

Other namesAmerican House Spider, cobweb spider, domestic spider
Lifespan Not known
DistributionCentral Americas, Mexico, northern and southern parts of Canada
HabitatIn the interior and exterior of buildings, in sheds, stables, and barns as well as on culverts and bridges
PredatorsOther spider kinds like the pirate spiders (of the Mimetus genus) and jumping spiders (of the Metacyrba undata and Phidippus variegatus). Another predator includes the assassin bug that mostly feeds on the spiderlings
DietMosquitoes, flies, wasps, ants, butterflies, cockroaches and grasshoppers
Image of Common House Spider
Cobweb Spider

Did You Know

  • Several other species all over the world are also known by the name of house spider like the barn funnel weaver (Tegenaria domestica) and the barn spider (Araneus cavaticus).
  • Unlike most other spiders which are seen wandering in spring and autumn, this kind is spotted mostly in winters.

In summary, the American house spider, though small and often overlooked, plays a crucial role in our ecosystems.

Guess what? The American house spider is a popular spider many people meet! Even though its name says “American,” it’s also found in places like Pakistan and Myanmar. These spiders like being near humans. We’ve got a bunch of cool facts about them to share with you. Let’s get started!

Common House Spider

Physical Description and Identification

Adults

  • Size: Females measure between 3/16 -5/16 inches, while the males are slightly smaller, ranging from 1/8 – 3/16 inches.
  • Color: Typically dull brown, the males and females sport yellow and orange legs, respectively. Their bodies feature a patterned appearance with various shades, aiding in camouflage.
  • Other characteristics: Females have a spherical abdomen, while males have an elongated one. Both genders have long, skinny legs, but the ankles are adorned with comb-like hairs.
Common House Spider Size

Eggs 

Each female has the capacity of producing approximately 17 egg sacs, which have a brown color and are pear-shaped. 100-400 eggs come out from a single sac that remains with their mother for a certain span.

Common House Spider Egg

Spiderlings

The juvenile spiders hatch within a span of 7 to 10 days after which they gradually disperse.

Common House Spiderlings

The Web

They build tangled and messy webs close to the dwellings of human beings.

Common House Spider Web

Are Common House Spiders Venomous?

Yes, but their venom is not harmful to humans, unlike their relatives, the black widow.

Can Common House Spiders Bite?

While bites are rare, they can occur, typically feeling like a small pinch. Though not dangerous, bites can cause pain, swelling, itching, and redness for a few days. Caution is advised when dealing with these tiny beings.

Common House Spider Bite
American House Spider

Ecological Importance and Behavior of Common House Spider

The American house spider plays a vital role in controlling the population of various insect species, contributing significantly to maintaining ecological balance. They are expert hunters, using their tangled webs to trap prey. Their presence in homes can help in reducing the number of pests, making them an ally in natural pest control.

Natural Predator: These spiders face threats from various predators, including other spider species like pirate and jumping spiders, as well as assassin bugs. These predators help keep the population of American house spiders in check, preventing overpopulation and ensuring a healthy balance within their ecosystem.

Prey-Predator Dynamics: The American house spider is both a predator and prey, sitting in the middle of the food chain. Their role is crucial as they help to control insect populations while providing food for other predators. 

Relationship with Humans: While some may find their presence in homes unwelcome, American house spiders are generally harmless to humans. Their bites are rare and not medically significant. Understanding their role in the ecosystem and their generally benign nature can lead to a more harmonious coexistence.

Quick Facts

Other namesAmerican House Spider, cobweb spider, domestic spider
Lifespan Not known
DistributionCentral Americas, Mexico, northern and southern parts of Canada
HabitatIn the interior and exterior of buildings, in sheds, stables, and barns as well as on culverts and bridges
PredatorsOther spider kinds like the pirate spiders (of the Mimetus genus) and jumping spiders (of the Metacyrba undata and Phidippus variegatus). Another predator includes the assassin bug that mostly feeds on the spiderlings
DietMosquitoes, flies, wasps, ants, butterflies, cockroaches and grasshoppers
Image of Common House Spider
Cobweb Spider

Did You Know

  • Several other species all over the world are also known by the name of house spider like the barn funnel weaver (Tegenaria domestica) and the barn spider (Araneus cavaticus).
  • Unlike most other spiders which are seen wandering in spring and autumn, this kind is spotted mostly in winters.

In summary, the American house spider, though small and often overlooked, plays a crucial role in our ecosystems.